There is no continuity of subject in a dictionary.

词典的主题是没有连续性的。

Seriality and visual repetition in his work underline this aspect.

他作品中的连续性和视觉重现强调了这个方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河流拥有完整性、连续性、清洁性、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利的机会，然后揭露其证据的不连续性。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不连续性假设的数值方法,它特别适合于求解节理岩体中的非连续性问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜连作根系微生物种群连续性变进行了跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质的不连续性来探测地下目标的无损检测工。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷的波普美学和达米安•赫斯特严苛的连续性。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结的连续性方程进行了求解，给出了不同边界条件下光生载流子浓度的一般形式解，并对结果进行了分析讨论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油生产的连续性特点以及输送介质有凝、燃、爆的性质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分流河道连续性较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域的"平移"方法,给出了定义在赋范线性空间内的凸集上的次凸泛函连续性的简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在的不连续性问题,提出了采用压电陀螺和里程仪组成的低成本航迹推算系统与GPS组合方案。

There is no continuity of subject in a dictionary.

词典的主题是没有连续性的。

Seriality and visual repetition in his work underline this aspect.

他作品中的连续性和视觉重现强调了这个方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河流拥有完整性、连续性、清洁性、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

心地等待着她有利的机会，然后揭露其证据的不连续性。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不连续性假设的数值方法,它特别适合于求解节理岩体中的非连续性问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用板培养法对黄瓜连作根系微生物种群连续性变进行了跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质的不连续性来探测地下目标的无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷的波普美学和达米安•赫斯特严苛的连续性。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下PN的连续性方程进行了求解，给出了不同边界条件下光生载流子浓度的一般形式解，并对果进行了分析讨论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油生产的连续性特点以及输送介质具有易凝、易燃、易爆的性质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分流河道连续性较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域的"移"方法,给出了定义在赋范线性空间内的凸集上的次凸泛函连续性的简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在的不连续性问题,提出了采用压电陀螺和里程仪组成的低成本航迹推算系统与GPS组合方案。

There is no continuity of subject in a dictionary.

词典主题是没有性。

Seriality and visual repetition in his work underline this aspect.

他作品中性和视觉重现强调了这个方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河流拥有完整性、性、清洁性、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利机会，然后揭露其证据不性。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不性假设数值方法,它特别适合于求解节理岩体中非性问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜作根系微生物种群性变进行了跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质不性来探测地下目标无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷波普美学和达米安•赫斯特严苛性。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结性方程进行了求解，给出了不同边界条件下光生载流子浓度一般形式解，并对结果进行了分析讨论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油生产性特点以及输送介质具有易凝、易燃、易爆性质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分流河道性较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域"平移"方法,给出了定义在赋范线性空间内凸集上次凸泛函性简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在不性问题,提出了采用压电陀螺和里程仪组成低成本航迹推算系统与GPS组合方案。

There is no continuity of subject in a dictionary.

词典的主题是没有连续性的。

Seriality and visual repetition in his work underline this aspect.

他作品中的连续性和视觉重现强调了向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河拥有完整性、连续性、清洁性、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利的机会，然后揭露其证据的不连续性。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不连续性假设的数值法,它特别适合于求解节理岩体中的非连续性问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜连作根系微生物种群连续性变进行了跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质的不连续性来探测地下目标的无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷的波普美学和达米安•赫斯特严苛的连续性。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结的连续性程进行了求解，给出了不同边界条件下光生浓度的一般形式解，并对结果进行了分析讨论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油生产的连续性特点以及输送介质具有易凝、易燃、易爆的性质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分河道连续性较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域的"平移"法,给出了定义在赋范线性空间内的凸集上的次凸泛函连续性的简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在的不连续性问题,提出了采用压电陀螺和里程仪组成的低成本航迹推算系统与GPS组合案。

There is no continuity of subject in a dictionary.

词典的主题是没有的。

Seriality and visual repetition in his work underline this aspect.

他作品中的和视觉重现强调这个方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河流拥有完整、、清洁、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利的机会，然后揭露其证据的不。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不假设的数值方法,它特别适合于求解节理岩体中的非问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜作根系微生物种群变进踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质的不来探测地下目标的无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷的波普美学和达米安•赫斯特严苛的。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结的方程进求解，给出不同边界条件下光生载流子浓度的一般形式解，并对结果进分析讨论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油生产的特点以及输送介质具有易凝、易燃、易爆的质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分流河道较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域的"平移"方法,给出定义在赋范线空间内的凸集上的次凸泛函的简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在的不问题,提出采用压电陀螺和里程仪组成的低成本航迹推算系统与GPS组合方案。

There is no continuity of subject in a dictionary.

词典是没有连续性。

Seriality and visual repetition in his work underline this aspect.

他作品中连续性和视觉重现强调了这个方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河流拥有完整性、连续性、清洁性、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利机会，然后揭露其证据不连续性。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不连续性假设数值方法,它特别适合于求解节理岩体中非连续性问。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜连作根系微物种群连续性变进行了跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质不连续性来探测地下目标无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷波普美学和达米安•赫斯特严苛连续性。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结连续性方程进行了求解，给出了不同边界条件下光载流子浓度一般形式解，并对结果进行了分析讨论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油连续性特点以及输送介质具有易凝、易燃、易爆性质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分流河道连续性较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域"平移"方法,给出了定义在赋范线性空间内凸集上次凸泛函连续性简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在不连续性问,提出了采用压电陀螺和里程仪组成低成本航迹推算系统与GPS组合方案。

There is no continuity of subject in a dictionary.

词典的主题是没有的。

Seriality and visual repetition in his work underline this aspect.

他作品中的和视觉重现强调了这个方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河流拥有完整、、清洁、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利的机会，然后揭露其证据的不。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不假设的数值方法,它特别适合于求解节理岩体中的非问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜作系微生物种群变进行了跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质的不来探测地下目标的无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷的波普美学和达米安•赫斯特严苛的。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结的方程进行了求解，给出了不同边界条件下光生载流子浓度的一般形式解，并对结果进行了分析。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

据输油生产的特点以及输送介质具有易凝、易燃、易爆的质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分流河道较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域的"平移"方法,给出了定义在赋范线空间内的凸集上的次凸泛函的简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在的不问题,提出了采用压电陀螺和里程仪组成的低成本航迹推算系统与GPS组合方案。

There is no continuity of subject in a dictionary.

词典的主题是没有连续性的。

Seriality and visual repetition in his work underline this aspect.

他作品中的连续性和视觉重现强调方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河拥有完整性、连续性、清洁性、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利的机会，然后揭露其证据的不连续性。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不连续性假设的数值方法,它特别适合于求解节理岩体中的非连续性问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜连作根系微生物种群连续性变进行跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质的不连续性来探测地下目标的无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

他们倾向于关注如杰夫•昆斯、村上隆色彩缤纷的波普美学和达米安•赫斯特严苛的连续性。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结的连续性方程进行求解，给出不同边界条件下光生载度的一般形式解，并对结果进行分析讨论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油生产的连续性特点以及输送介质具有易凝、易燃、易爆的性质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下分河道连续性较差，呈坨状分布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域的"平移"方法,给出定义在赋范线性空间内的凸集上的次凸泛函连续性的简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在的不连续性问题,提出采用压电陀螺和里程仪组成的低成本航迹推算系统与GPS组合方案。

There is no continuity of subject in a dictionary.

词典主题是没有连续。

Seriality and visual repetition in his work underline this aspect.

作品中连续和视觉重现强调了这个方向。

A river has the five rights as integrity, continuity, cleanness, water consumption and demiurgic.

河流拥有完整、连续、清洁、用水和造物五种权利。

The lawyer waited patiently for her opening,then exposed the inconsistency in the testimony.

律师耐心地等待着她有利机会，然后揭露其证据不连续。

The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不连续假设数值方法,它特别适合于求解节理岩体中非连续问题。

Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.

摘要利用平板培养法对黄瓜连作根系微生物种群连续变进行了跟踪研究。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质不连续来探测地下目标无损检测工具。

They tend to point to the colourful Pop aesthetics of artists such as Jeff Koons and Takashi Murakami and the rigorous seriality of Damien Hirst.

们倾向于关注如杰夫•昆斯、村上隆色彩缤纷波普美学和达米安•赫斯特严苛连续。

The one dimensional continuity equations of n-on-p planar PN junction are solved at different boundary conditions. Generalized solutions of photocarrier concentration are given in this paper.

摘要对一维情况下平面PN结连续方程进行了求解，给出了不同边界条件下光生载流子浓度一般形式解，并对结果进行了论。

The implementation of hot work for station crude oil pipeline must be in accordance with the standard of SY5859-93 because the media transported are solidifiable,inflammable,and explosive.

根据输油生产连续特点以及输送介质具有易凝、易燃、易爆质,站内原油管道施工动火必须严格遵循SY5859—93《石油工业企业动火安全规程》。

Cuspate deltaic sands micro-facies, which formed at the time of powerful wave action, the continuity of marine distributary channel is bad, and distributes in cuspate shape. 3.

3、坨状三角洲砂体微相，形成时波浪作用很强，水下流河道连续较差，呈坨状布。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域"平移"方法,给出了定义在赋范线空间内凸集上次凸泛函连续简捷证明。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在不连续问题,提出了采用压电陀螺和里程仪组成低成本航迹推算系统与GPS组合方案。