He lost consciousness at the first whiff of ether.
他一嗅到乙醚便失去了知觉。
He lost consciousness at the first whiff of ether.
他一嗅到乙醚便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了
伯
、叔
、多
和醚
四种药剂对高岭石、叶腊石、伊利石
浮选行为,结果表明捕收能力顺序为多
>叔
>醚
>
>伯
。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木醚。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
溶于丙酮、苯、甲苯、二硫化碳、二氯乙烷,微溶于乙醇和乙醚,不易溶于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类应为五指毛桃
有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯醚树
为原料,合成了一种新颖不饱和聚酯型无溶剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖
合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内醚糖
阳离子聚合制备均聚多糖,及用糖原酸酯衍生物通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟乙丙烯和四氟乙烯全氟代烷基乙烯基醚共聚物
结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发剂,研究了乙烯基正丁醚
本体和溶液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅烷反应合成二甲硅基双烯醇醚进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以醋酸和乙二醇单乙醚为原料,活性白土负载磷钨酸作为催化剂,合成了乙二醇单乙醚醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基甲酚醚、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树
体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳素悬浊液
制备与作用方式以及在铅酸蓄电池使用聚氧化乙烯烯丙基缩水甘油基壬基苯醚
硫酸酯钠盐、香草醇和香草醛
目
及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在联芳基合成、二芳基醚合成、芳香
合成和催化加成反应中
应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水乙醇、乙醚、丙酮及水作溶剂,对四川汉源花椒作了精油提取研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠醚化合物,其中7个冠醚是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量
千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二乙烯基醚
反应,我们得到了一种新颖
酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树
DCP催化作用下与无水乙醇反应生成了异龙脑基乙醚。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌
细胞壁缺乏细菌细胞壁组成
普遍物质-胞壁质,其连接是醚连接而不是酯连接。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件
观点;若发现问题,欢迎向我们指正。
;苍天;天空

;

;石油精
;
基


;二乙


;乙二醇乙
;甘醇
;二环氧甘油
;二氧化丙烯

,二乙
提取物

;二苯
(等于diphenyl oxide)



He lost consciousness at the first whiff of ether.
他一嗅到乙
便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了脂肪伯胺、叔胺、多胺和
胺四种药剂对高岭石、叶腊石、伊利石的浮选行为,结果

收能力顺序为多胺>叔胺>
胺>脂肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成
基柏木
。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
溶于丙酮、苯、
苯、二硫化碳、二氯乙烷,微溶于乙醇和乙
,不易溶于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类应为五指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯
树脂为原料,合成了一种新颖不饱和聚酯型无溶剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内
糖的阳离子聚合制备均聚多糖,及用糖原酸酯衍生物通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟乙丙烯和四氟乙烯全氟代烷基乙烯基
共聚物的结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发剂,研究了乙烯基正丁
的本体和溶液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二
基二氯硅烷反应合成二
硅基双烯醇
进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以醋酸和乙二醇单乙
为原料,活性白土负载磷钨酸作为催化剂,合成了乙二醇单乙
醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基
酚
、烯丙基
酚、烯丙基
酚和二烯丙基双酚A改性BMI所得树脂体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳素悬浊液的制备与作用方式以及在铅酸蓄电池使用聚氧化乙烯烯丙基缩水甘油基壬基苯
的硫酸酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在联芳基合成、二芳基
合成、芳香胺合成和催化加成反应中的应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水乙醇、乙
、丙酮及水作溶剂,对四川汉源花椒作了精油提取研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠
化合物,其中7个冠
是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量的千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二乙烯基
的反应,我们得到了一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树脂DCP催化作用下与无水乙醇反应生成了异龙脑基乙
。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是
连接而不是酯连接。
声
:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其
达内容亦不代
本软件的观点;若发现问题,欢迎向我们指正。
;苍天;天空
;甲
;石油精
;甲基


;二乙


;乙二醇乙
;甘醇
;二环氧甘油
;二氧化丙烯

,二乙
提取物

;二苯
(等于diphenyl oxide)


He lost consciousness at the first whiff of ether.
他一嗅到乙
便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了脂肪伯胺、叔胺、多胺和
胺四种药
对高岭石、叶腊石、伊利石的浮选行为,结果表明捕收能力顺序为多胺>叔胺>
胺>脂肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏
。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
于丙酮、苯、甲苯、二硫化碳、二氯乙烷,微
于乙醇和乙
,不易
于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类应为五指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯
树脂为原料,合成了一种新颖不饱和聚酯型无
浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内
糖的阳离子聚合制备均聚多糖,及用糖原酸酯衍生物通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟乙丙烯和四氟乙烯全氟代烷基乙烯基
共聚物的结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发
,研究了乙烯基正丁
的本体和
液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅烷反应合成二甲硅基双烯醇
进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以醋酸和乙二醇单乙
为原料,活性白土负载磷钨酸作为催化
,合成了乙二醇单乙
醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基甲酚
、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树脂体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳素悬浊液的制备与作用方式以及在铅酸蓄电池使用聚氧化乙烯烯丙基缩水甘油基壬基苯
的硫酸酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在联芳基合成、二芳基
合成、芳香胺合成和催化加成反应中的应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水乙醇、乙
、丙酮及水作
,对四川汉源花椒作了精油提取研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠
化合物,其中7个冠
是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量的千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二乙烯基
的反应,我们得到了一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树脂DCP催化作用下与无水乙醇反应生成了异龙脑基乙
。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是
连接而不是酯连接。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。
醚;苍天;天空醚
醚;二
醚
酸
酯;醋酸
酯
二醇醚;
二醇
醚;甘醇醚
醚,二
醚
烯醚He lost consciousness at the first whiff of ether.
他一嗅到
醚便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了脂肪伯胺、叔胺、多胺和醚胺四种药剂对高岭石、叶腊石、伊利石的浮选行为,结果表明捕收能力顺序为多胺>叔胺>醚胺>脂肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木醚。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
溶于丙酮、苯、甲苯、二硫化碳、二

,微溶于
醇和
醚,不易溶于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类应为五指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯醚树脂为原料,合成了一种新颖不饱和聚酯型无溶剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内醚糖的阳离子聚合制备均聚多糖,及用糖原酸酯衍生物通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟
丙烯和四氟
烯全氟代
基
烯基醚共聚物的结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发剂,研究了
烯基正丁醚的本体和溶液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二
硅
反应合成二甲硅基双烯醇醚进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以醋酸和
二醇单
醚为原料,活性白土负载磷钨酸作为催化剂,合成了
二醇单
醚醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基甲酚醚、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树脂体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳素悬浊液的制备与作用方式以及在铅酸蓄电池使用聚氧化
烯烯丙基缩水甘油基壬基苯醚的硫酸酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在
芳基合成、二芳基醚合成、芳香胺合成和催化加成反应中的应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水
醇、
醚、丙酮及水作溶剂,对四川汉源花椒作了精油提取研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠醚化合物,其中7个冠醚是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量的千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二
烯基醚的反应,我们得到了一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树脂DCP催化作用下与无水
醇反应生成了异龙脑基
醚。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是醚连接而不是酯连接。
声明:以上例句、词性分类均由互
网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。
;苍天;天空
;甲
;石油精
;甲基


;二乙


;乙二醇乙
;甘醇
;二环氧甘油
;二氧化丙烯

,二乙
提取物

;二苯
(等
diphenyl oxide)


He lost consciousness at the first whiff of ether.
他一嗅到乙
便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了脂肪伯胺、叔胺、多胺和
胺四种药剂对高岭石、叶腊石、伊利石的浮选行为,结果表明捕收能力顺序为多胺>叔胺>
胺>脂肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木
。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.

丙酮、苯、甲苯、二硫化碳、二氯乙烷,微
乙醇和乙
,不易
水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类应为五指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯
树脂为原料,合成了一种新颖不饱和聚酯型无
剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内
糖的阳离子聚合制备均聚多糖,及用糖原酸酯衍生物通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟乙丙烯和四氟乙烯全氟代烷基乙烯基
共聚物的结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发剂,研究了乙烯基正丁
的本体和
液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅烷反应合成二甲硅基双烯醇
进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以醋酸和乙二醇单乙
为原料,活性白土负载磷钨酸作为催化剂,合成了乙二醇单乙
醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基甲酚
、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树脂体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳素悬浊液的制备与作用方式以及在铅酸蓄电池使用聚氧化乙烯烯丙基缩水甘油基壬基苯
的硫酸酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在联芳基合成、二芳基
合成、芳香胺合成和催化加成反应中的应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水乙醇、乙
、丙酮及水作
剂,对四川汉源花椒作了精油提取研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠
化合物,其中7个冠
是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量的千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二乙烯基
的反应,我们得到了一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树脂DCP催化作用下与无水乙醇反应生成了异龙脑基乙
。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是
连接而不是酯连接。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。
醚;苍天;天空醚
醚;二
醚

酯;

酯
二醇醚;
二醇
醚;甘醇醚
醚,二
醚
烯醚He lost consciousness at the first whiff of ether.
他一嗅到
醚便失去
知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研

肪伯胺、叔胺、多胺和醚胺四种药剂对高岭石、叶腊石、伊利石的浮选行为,结果表明捕收能力顺序为多胺>叔胺>醚胺>
肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木醚。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
溶于丙酮、苯、甲苯、二硫化碳、二氯
烷,微溶于
醇和
醚,不易溶于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类应为五指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯醚树
为原料,合成
一种新颖不饱和聚酯型无溶剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍
1,6-、1,4-、1,3-、1,2-缩水内醚糖的阳离子聚合制备均聚多糖,及用糖原
酯衍生物通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述
聚全氟
丙烯和四氟
烯全氟代烷基
烯基醚共聚物的结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发剂,研

烯基正丁醚的本体和溶液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅烷反应合成二甲硅基双烯醇醚进行
研
。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以
和
二醇单
醚为原料,活性白土负载磷钨
作为催化剂,合成
二醇单
醚
酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基甲酚醚、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树
体系进行
研
。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述
铅
蓄电池用碳素悬浊液的制备与作用方式以及在铅
蓄电池使用聚氧化
烯烯丙基缩水甘油基壬基苯醚的硫
酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述
芳基硼
在联芳基合成、二芳基醚合成、芳香胺合成和催化加成反应中的应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水
醇、
醚、丙酮及水作溶剂,对四川汉源花椒作
精油提取研
。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成
10个内酯型冠醚化合物,其中7个冠醚是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍
一种性能超越规范很宽裕量的千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧
和二
烯基醚的反应,我们得到
一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树
DCP催化作用下与无水
醇反应生成
异龙脑基
醚。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是醚连接而不是酯连接。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。

;乙醚;苍天;天空醚He lost consciousness at the first whiff of ether.
他一嗅到乙醚便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了脂肪伯胺、叔胺、多胺和醚胺四种药剂对高岭石、叶腊石、伊利石的浮选行
,结果表明捕收能力顺序
多胺>叔胺>醚胺>脂肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木醚。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
溶于丙酮、苯、甲苯、二硫化碳、二氯乙烷,微溶于乙醇和乙醚,不易溶于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类

指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
改性二苯醚树脂
原料,合成了一种新颖不饱和聚酯型无溶剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内醚糖的阳离子聚合制备均聚多糖,及用糖原酸酯衍生物通过缩聚反
制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟乙丙烯和四氟乙烯全氟代烷基乙烯基醚共聚物的结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
二苯基-4-苯硫基代苯基硫鎓盐(DPTS)
光引发剂,研究了乙烯基正丁醚的本体和溶液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅烷反
合成二甲硅基双烯醇醚进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
醋酸和乙二醇单乙醚
原料,活性白土负载磷钨酸作
催化剂,合成了乙二醇单乙醚醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对
烯丙基甲酚醚、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树脂体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳素悬浊液的制备与作用方式
及在铅酸蓄电池使用聚氧化乙烯烯丙基缩水甘油基壬基苯醚的硫酸酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在联芳基合成、二芳基醚合成、芳香胺合成和催化加成反
中的
用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水乙醇、乙醚、丙酮及水作溶剂,对四川汉源花椒作了精油提取研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠醚化合物,其中7个冠醚是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量的千兆位
网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二乙烯基醚的反
,我们得到了一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树脂DCP催化作用下与无水乙醇反
生成了异龙脑基乙醚。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是醚连接而不是酯连接。
声明:
上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。
]二苯醚
丙烯醚

]乙烯醚
学]

醚
]异丙醚
]丙二醇单甲醚He lost consciousness at the first whiff of ether.
他一嗅到乙醚便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了脂肪伯胺、叔胺、多胺和醚胺四种药剂对高岭石、叶腊石、伊利石的浮选行为,结果表明捕收能力顺序为多胺>叔胺>醚胺>脂肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木醚。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
溶于丙酮、苯、甲苯、二硫
碳、二氯乙烷,微溶于乙醇和乙醚,不易溶于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆
类应为五指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯醚树脂为原料,合成了一种新颖不饱和聚酯型无溶剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内醚糖的阳离子聚合制备均聚多糖,及用糖原酸酯衍生
通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟乙丙烯和四氟乙烯全氟代烷基乙烯基醚共聚
的结构和力学热学、辐射、
学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发剂,研究了乙烯基正丁醚的本体和溶液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅烷反应合成二甲硅基双烯醇醚进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以醋酸和乙二醇单乙醚为原料,活性白土负载磷钨酸作为催
剂,合成了乙二醇单乙醚醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基甲酚醚、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树脂体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳
悬浊液的制备与作用方式以及在铅酸蓄电池使用聚氧
乙烯烯丙基缩水甘油基壬基苯醚的硫酸酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在联芳基合成、二芳基醚合成、芳香胺合成和催
加成反应中的应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水乙醇、乙醚、丙酮及水作溶剂,对四川汉源花椒作了精油提
研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠醚
合
,其中7个冠醚是新
合
,其结构均由元
分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量的千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二乙烯基醚的反应,我们得到了一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树脂DCP催
作用下与无水乙醇反应生成了异龙脑基乙醚。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍
质-胞壁质,其连接是醚连接而不是酯连接。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。
He lost consciousness at the first whiff of ether.
他一嗅到乙醚便失去了知觉。
Behaviors of armeen,tertiary amine,poly-amide and ether amide in floatation of kaolinite,pyrauxite and illite are studied.
研究了脂肪伯胺、叔胺、多胺和醚胺四种药剂对高岭石、叶腊石、伊利石的浮选行为,结果表明捕收能力顺序为多胺>叔胺>醚胺>脂肪>伯胺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木醚。
No osmyl and no taste.Soluble in Benzene,Acetone,C2H4Cl2,CS2,toluene,party soluble in alcohol,diethyl ether,insoluble in water,gasoline.
于丙酮、苯、甲苯、二硫化碳、二氯乙
,
于乙醇和乙醚,不易
于水和汽油。
Its ether extract contains Isopsoralen and Bergapten.
香豆素类应为五指毛桃的有效部位之一。
One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.
以改性二苯醚树脂为原料,合成了一种新颖不饱和聚酯型无
剂浸渍绝缘漆。
For polysaccharide synthescs,ring open-ing polymerizatlon of 1,6-,1,4-,1,3-,and 1,2-anhydro sngars,and polycondensation of cya-noethylidene trityl ether sugars are described.
对多糖的合成主要介绍了1,6-、1,4-、1,3-、1,2-缩水内醚糖的阳离子聚合制备均聚多糖,及用糖原酸酯衍生物通过缩聚反应制备多糖。
Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.
分别阐述了聚全氟乙丙烯和四氟乙烯全氟代
基乙烯基醚共聚物的结构和力学热学、辐射、化学性能。
The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator.
以二苯基-4-苯硫基代苯基硫鎓盐(DPTS)为光引发剂,研究了乙烯基正丁醚的本体和
液光聚合。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅
反应合成二甲硅基双烯醇醚进行了研究。
Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst.
以醋酸和乙二醇单乙醚为原料,活性白土负载磷钨酸作为催化剂,合成了乙二醇单乙醚醋酸酯。
BMI resin systems modified by allyl methylphenol ether,allyl methylphenol, allyl methol phenol and diallyl bisphenol A, respectly have been studied.
对以烯丙基甲酚醚、烯丙基甲酚、烯丙基甲酚和二烯丙基双酚A改性BMI所得树脂体系进行了研究。
Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
综述了铅酸蓄电池用碳素悬浊液的制备与作用方式以及在铅酸蓄电池使用聚氧化乙烯烯丙基缩水甘油基壬基苯醚的硫酸酯钠盐、香草醇和香草醛的目的及作用机理。
The Applications of Arylboronic Acid in biaryl synthesis,synthesis of diaryl ethers,synthesis of aromatic amines and catalytic addition reactions were summarized.
综述了芳基硼酸在
芳基合成、二芳基醚合成、芳香胺合成和催化加成反应中的应用。
Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.
采用无水乙醇、乙醚、丙酮及水作
剂,对四川汉源花椒作了精油提取研究。
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠醚化合物,其中7个冠醚是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
In this paper,a type of kilomega bps chips group for ether net which surpasses the standards by large abundance is presented.
介绍了一种性能超越规范很宽裕量的千兆位以太网芯片组。
A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.
通过一元羧酸和二乙烯基醚的反应,我们得到了一种新颖的酯缩醛结构分子玻璃。
Isobornyl ethyl ether was prepared by ethoxylation of camphene with absolute ethanol in the presence of DCP heat-resistant ion exchange resin.
工业莰烯在耐高温离子交换树脂DCP催化作用下与无水乙醇反应生成了异龙脑基乙醚。
Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是醚连接而不是酯连接。
声明:以上例句、词性分类均由互
网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。