概况

Taking appropriative train test line of Guangzhou metro line 2 as an example, this paper introduces the equipment, function and characters of signal system and service conditions of interfaces.

以广州地铁2号线的专用试车线为例，分析其信号系统的设备概况、功能及特点，介绍各接口的使用情况。

Introduces the general situation and history of spider silk ,summarizes the physical and chemical characteristics of spider silk .

介绍了蜘蛛丝的概况及研究历史，概述了蜘蛛丝的物理、化学及机械方面的性能，综述了国内外利用生物技术人工生产蜘蛛丝研究的状况及进展，同时也分析了蜘蛛丝在纺织制衣、军事、医疗、高强度材料等方面的应用。

This paper introduced the state of new product of δ-layered sodium silicate, and gives the market analysis and the possibility of mass production.

介绍了新一代无磷助洗剂层状结晶二硅酸纳的产品概况，并做了市场及在国内工业化生产的可行性分析。

This thesis is composed by three parts.The first part: The Sogdian migrating to Dunhuang continually and trading with China from Han dynasty to Tang and Five dynasties is the main reason which results in prevalenting of Sogdian Culture in DunHuang.The second part: This part is the core and the key.

本文分为三个部分：第一部分追溯了汉至唐五代时期粟特等中亚民族不断往来移徙于敦煌、河西一带的历史概况，认为他们频繁的商业活动促使了粟特文化向敦煌的传播，这是唐五代敦煌胡文化盛行的主要原因。

This article introduces the general conditions of solanum nigrum in China.

本文介绍了中国龙葵的资源概况及开发前景。

This article is devoted to the development hull lines fairing, analyses some cases of this topic in home and abroad, poses some technical questions of hull lines fairing and also gives the solution including the spline curve precision fairing theory, ship data series, adept more data interactive way, and the integration of lines fairing and CAD/CAM, etc.

文摘：本文以船体线型光顺的发展方向为题，论述了国内外的发展概况，针对国内情况提出了船体线型光顺的一些技术问题和解决方案，包括建立样条曲线的精密光顺理论，系列船数据库，更多地采用数据图形交互手段，线型光顺和CAD/CAM实现一体化。

Firstly, this paper briefly introduces the development of imaging spectrometer, and the recent development of the imaging spectral technique.

本文首先简要地介绍了成像光谱仪的发展概况，介绍了国内外在成像光谱技术方面的最新进展。

The total syntheses of sphingosine , ceramide and glycosphingolipid were reviewed with emphasis on the recent progresses.

综述了神经鞘氨醇、神经酰胺及鞘糖脂全合成研究的基本概况，重点评述了其最近的研究进展情

This paper will review our current understanding of magnetism in Bose gases, especially focusing on new results obtained regarding ferromagnetic transitions in spinor bosons and the spin dynamics of spinor condensates.

文章通过对比费米气体的相关结果，介绍了旋量玻色气体磁性的研究概况和最新进展，特别是铁磁性玻色气体的磁性相变以及在低温下铁磁性凝聚体的动力学特征。

At first, configuration method of stabilization of LOS and survey of development of AOEP in the world are summarized in this paper, and then principal of how movement of airplane can be isolated by a two-axis-platform is analyzed theoretically. Requirements of stabilization of LOS to servo system are put forward. It provides the basis of theory for designing servo system.

本文首先概述了国内外光电平台的结构和视轴稳定方法以及光电平台的发展概况，介绍了常用的稳定与跟踪控制方法；进而从理论上分析了两轴光电稳定平台隔离载体角运动的原理，总结并提出了视轴稳定对伺服系统的性能要求，从而为伺服系统的设计提供了理论依据。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。