Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常在夜间狩猎。

The puddles skimmed over during the cold night.

夜间寒冷, 水潭结上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而夜间出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经结束了他夜间门诊。

Moisture in the atmosphere condensed into dew during the night.

气中水汽在夜间凝结成了露珠。

You are asked to dip the car's headlights when you meet another car at night.

夜间开车遇到交会车辆时应该减弱前灯亮。

The roof of the granny's hut came down during the night.

娘草屋屋顶在夜间塌下来了。

The thought of working nights fills me with abject horror.

一想到要夜间工作我就觉得惨兮兮。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有夜间营业商店。

The waterfall was lit up at night with pink and green floodlights.

夜间粉红和绿泛灯把瀑布映照得辉煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及夜间课程中找寻你主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

夜间辉或夜辉相当于在100米距离一支强。

I don’t buy the burglary story.

我可不相信这种夜间遭到撬窃说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起夜间觉醒，经坐起缓解，是为阵发性夜间呼吸困难。

It hailed during the night.

夜间下了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照相干版适用于各种常规兵器和尖端武器曳弹道夜间拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别是存在夜间低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦夜间收容所里过夜1 000名无家可归者只是冰山一角，在这个首都还有成千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形影响,夜间低层气流场常表现为由北向南下坡风,白天逐渐转为由南往北上坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常在狩猎。

The puddles skimmed over during the cold night.

寒冷, 水潭结上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经结束了他门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中水汽在凝结成了露珠。

You are asked to dip the car's headlights when you meet another car at night.

开车遇到交会车辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋屋顶在塌下来了。

The thought of working nights fills me with abject horror.

一想到要工作我就觉得惨兮兮。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有营业商店。

The waterfall was lit up at night with pink and green floodlights.

粉红和绿泛光灯把瀑布映照得辉煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及课程中找寻你主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

辉光或辉相当于在100米距离一支烛光强度。

I don’t buy the burglary story.

我可不相信这种遭到撬窃说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起觉醒，经坐起缓解，发性呼吸困难。

It hailed during the night.

下了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照相干版适用于各种常规兵器和尖端武器曳光弹道拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别存在低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦收容所里过1 000名无家可归者只冰山一角，在这个首都还有成千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形影响,低层大气流场常表现由北向南下坡风,白天逐渐转由南往北上坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常在夜间狩猎。

The puddles skimmed over during the cold night.

夜间寒冷, 水潭结上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而夜间出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经结束了他夜间门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中水汽在夜间凝结成了露珠。

You are asked to dip the car's headlights when you meet another car at night.

夜间到交会辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋屋顶在夜间塌下来了。

The thought of working nights fills me with abject horror.

一想到要夜间工作我就觉得惨兮兮。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有夜间营业商店。

The waterfall was lit up at night with pink and green floodlights.

夜间粉红和绿泛光灯把瀑布映照得辉煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及夜间课程中找寻你主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

夜间辉光或夜辉相当于在100米距离一支烛光强度。

I don’t buy the burglary story.

我可不相信这种夜间遭到说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起夜间觉醒，经坐起缓解，是为阵发性夜间呼吸困难。

It hailed during the night.

夜间下了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照相干版适用于各种常规兵器和尖端武器曳光弹道夜间拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别是存在夜间低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦夜间收容所里过夜1 000名无家可归者只是冰山一角，在这个首都还有成千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形影响,夜间低层大气流场常表现为由北向南下坡风,白天逐渐转为由南往北上坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常在狩猎。

The puddles skimmed over during the cold night.

寒冷, 水潭结上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经结束了他的门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中的水汽在凝结成了露珠。

You are asked to dip the car's headlights when you meet another car at night.

开车遇交会车辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋的屋顶在塌下来了。

The thought of working nights fills me with abject horror.

一工作我就觉得惨兮兮的。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有营业的商店。

The waterfall was lit up at night with pink and green floodlights.

的粉红和绿泛光灯把瀑布映照得煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及课程中找寻你的主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

光或相当于在100米距离的一支烛光的强度。

I don’t buy the burglary story.

我可不相信这种遭撬窃的说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起觉醒，经坐起缓解，是为阵发性呼吸困难。

It hailed during the night.

下了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照相干版适用于各种常规兵器和尖端武器曳光弹道的拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别是存在低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中的应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦收容所里过的1 000名无家可归者只是冰山的一角，在这个首都还有成千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形的影响,低层大气流场常表现为由北向南的下坡风,白天逐渐转为由南往北的上坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常在夜间狩猎。

The puddles skimmed over during the cold night.

夜间寒冷, 水潭上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而夜间出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经束了他的夜间门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中的水汽在夜间了露珠。

You are asked to dip the car's headlights when you meet another car at night.

夜间开车遇到交会车辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋的屋顶在夜间塌下来了。

The thought of working nights fills me with abject horror.

一想到要夜间工作我就觉得惨兮兮的。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有夜间营业的商店。

The waterfall was lit up at night with pink and green floodlights.

夜间的粉红和绿泛光灯把瀑布映照得辉煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及夜间课程中找寻你的主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

夜间辉光或夜辉相当于在100米距离的一支烛光的强度。

I don’t buy the burglary story.

我可不相信这种夜间遭到撬窃的说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端引起夜间觉醒，经起缓解，是为阵发性夜间困难。

It hailed during the night.

夜间下了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照相干版适用于各种常规兵器和尖端武器曳光弹道的夜间拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别是存在夜间低通气、肌疲劳或合并阻塞性睡眠暂停综合征患者中的应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦夜间收容所里过夜的1 000名无家可归者只是冰山的一角，在这个首都还有千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形的影响,夜间低层大气流场常表现为由北向南的下坡风,白天逐渐转为由南往北的上坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常在夜狩猎。

The puddles skimmed over during the cold night.

夜寒冷, 水潭结上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而夜出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经结束了他的夜门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中的水汽在夜凝结成了露珠。

You are asked to dip the car's headlights when you meet another car at night.

夜开车遇到交会车辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋的屋顶在夜来了。

The thought of working nights fills me with abject horror.

一想到要夜工作我就觉得惨兮兮的。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有夜营业的商店。

The waterfall was lit up at night with pink and green floodlights.

夜的粉红和绿泛光灯把瀑布映照得煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及夜课程中找寻你的主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

夜光或夜于在100米距离的一支烛光的强度。

I don’t buy the burglary story.

我可不信这种夜遭到撬窃的说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起夜觉醒，经坐起缓解，是为阵发性夜呼吸困难。

It hailed during the night.

夜了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照干版适用于各种常规兵器和尖端武器曳光弹道的夜拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别是存在夜低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中的应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦夜收容所里过夜的1 000名无家可归者只是冰山的一角，在这个首都还有成千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形的影响,夜低层大气流场常表现为由北向南的坡风,白天逐渐转为由南往北的上坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经在夜间狩猎。

The puddles skimmed over during the cold night.

夜间寒冷, 水潭薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而夜间出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经束他的夜间门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中的水汽在夜间凝成露珠。

You are asked to dip the car's headlights when you meet another car at night.

夜间开车遇到交会车辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋的屋顶在夜间塌下来。

The thought of working nights fills me with abject horror.

一想到要夜间工作我就觉得惨兮兮的。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有夜间营业的商店。

The waterfall was lit up at night with pink and green floodlights.

夜间的粉红和绿泛光灯把瀑布映照得辉煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及夜间课程中找寻你的主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

夜间辉光或夜辉相当于在100米距离的一支烛光的强度。

I don’t buy the burglary story.

我可不相信这夜间遭到撬窃的说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起夜间觉醒，经坐起缓解，是为阵发性夜间呼吸困难。

It hailed during the night.

夜间下冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照相干版适用于规兵器和尖端武器曳光弹道的夜间拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别是存在夜间低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中的应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦夜间收容所里过夜的1 000名无家可归者只是冰山的一角，在这个首都还有成千万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形的影响,夜间低层大气流场表现为由北向南的下坡风,白天逐渐转为由南往北的坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常夜间狩猎。

The puddles skimmed over during the cold night.

夜间寒冷, 水潭结上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而夜间出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经结束了他的夜间门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中的水汽夜间凝结成了露珠。

You are asked to dip the car's headlights when you meet another car at night.

夜间开车遇到交会车辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋的屋顶夜间塌下来了。

The thought of working nights fills me with abject horror.

一想到要夜间工作我就觉得惨兮兮的。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有夜间营业的商店。

The waterfall was lit up at night with pink and green floodlights.

夜间的粉红和绿泛光灯把瀑布映照得辉煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及夜间课程中找寻你的主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

夜间辉光或夜辉相当于100米距离的一支烛光的强度。

I don’t buy the burglary story.

我可不相信这种夜间遭到撬窃的说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起夜间觉醒，经坐起缓解，是为阵发性夜间呼吸困难。

It hailed during the night.

夜间下了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照相干版适用于各种常规兵器和尖端武器曳光弹道的夜间拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气COPD期特别是存夜间低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中的应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

伦敦夜间收容所里过夜的1 000名无家可归者只是冰山的一角，这个首都还有成千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形的影响,夜间低层大气流场常表现为由北向南的下坡风,白天逐渐转为由南往北的上坡风。

Jackals are wolflike hunters that do most of their hunting at night.

豺如狼一般经常在狩猎。

The puddles skimmed over during the cold night.

寒冷, 水潭结上了薄冰。

Bats sleep in the daytime and come out to hunt for food at night.

蝙蝠白天睡觉, 而出来觅食。

Doctor Bailey had finished his evening surgery.

贝利医生已经结束了他的门诊。

Moisture in the atmosphere condensed into dew during the night.

大气中的水汽在凝结成了露珠。

You are asked to dip the car's headlights when you meet another car at night.

开车遇到交会车辆时应该减弱前灯亮度。

The roof of the granny's hut came down during the night.

老大娘草屋的屋顶在下来了。

The thought of working nights fills me with abject horror.

一想到要工作我就觉得惨兮兮的。

They scouted around for a shop that was open late.

他们四处寻找, 看看还有没有营业的商店。

The waterfall was lit up at night with pink and green floodlights.

的粉红和绿泛光灯把瀑布映照得辉煌夺目。

To look for your ideas from meetings, colloquia, lectures and night courses.

从会议，座谈会，讲座，及课程中找寻你的主意。

The nighttime airglow, or nightglow, correspond to the intensity of a candle at 100m distance.

辉光或辉在100米距离的一支烛光的强度。

I don’t buy the burglary story.

我可不信这种遭到撬窃的说法。

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

如果端坐呼吸引起觉醒，经坐起缓解，是为阵发性呼吸困难。

It hailed during the night.

下了冰雹。

Type 190 Ballistics Longitude-Latitude Photographic Plate (BLL, photoplate) is dedicated for night photography of luminous ballistics of conventional or strategical arms.

190弹道经纬照干版适用各种常规兵器和尖端武器曳光弹道的拍摄[*]。

Recently,many new research progresses have been acquired in the use of NPPV on COPD patients with nocturnal hypoxaemia, respiratory muscle fatigue or sleep apnea syndrome.

本文就无创正压通气在COPD稳定期特别是存在低通气、呼吸肌疲劳或合并阻塞性睡眠呼吸暂停综合征患者中的应用研究进展作一综述。

The 1000 homeless people in London sleeping in night shelters are only the tip of the iceberg. There are many thousands of homeless people in the capital.

在伦敦收容所里过的1 000名无家可归者只是冰山的一角，在这个首都还有成千上万名流浪汉。

Such results are gotten: (1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.

(1)北京区域夏季边界层风场受西北特殊地形的影响,低层大气流场常表现为由北向南的下坡风,白天逐渐转为由南往北的上坡风。