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In my opinion, it is incorrect to definite chinese as a tool subject. From the angle of language nature, language is a complex systern of symbols used for human communications, it is obvious that language is closedly related to thought and language is an expression of culture, humanity and nation.

笔者认为，我们往往从语言的职能出发，界定语文的学科性质，然而当我们从语言的本质――语言是适应人们的交际需要而建立的一套复杂的符号系统――出发，将会发现，语言是与思维密切相联的，语言表达的内容具有思想性，语言及其表达的思想又具有文化性、人文性和民族性。

Based on topological model, the dynamics of DNA growth account for theFibonacci numbers and the golden angle (137.5°) as a consequence of dynamics.

尽管工作刚刚开始，某些新颍观点尚需深入探讨，无疑我们的结果有助于理解和揭示DNA奥秘。

The present invention relates to a method for heuristically starting up DC brushless servo electric machine, including the following steps of (1) after powerup of an increment type photoelectric encoder, electrifying a stator winding two by two with identical time interval to generate six-directional stator winding resultant magnetic fields;(2) detecting six different angles rotated by the rotor within identical tiny time interval by the photoelectric encoder;(3) selecting most positive value rotation angle from the six different angles, and determining maximum torque corresponding to the stator winding resultant magnetic field, and implementing servo startup using the maximum torque as constant starting torque;(4) after the zero-point signal of the photoelectric encoder occurring, switching to servo operation with normal constant torsion.

本发明直流无刷伺服电机试探启动方法，采用如下步骤：(1)增量式光电编码器上电后对定子绕组采用相同的时间间隔两两通电，顺序产生六个方向的定子绕组合成磁场；(2)由增量式光电编码器检测出转子在相同的微小时间间隔内分别转过的六个不同的角度；(3)从转子六个不同的角度中选出最大正值的转角，确定相应定子绕组合成磁场对应的最大转矩，并以该最大转矩为恒定启动转矩进行伺服启动；(4)当增量式光电编码器零点信号出现后，切换为正常恒转矩伺服运行。

METHODS: The endodontic instrument was assumed as a metal conical bar. The normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics. The relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, and metal elastic modulus were analyzed. The criteria for yielding and fracture of the instrument were discussed.

将根管器械刃部假设截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

METHODS: The endodontic instrument was assumed as a metal conical bar, the normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics , the relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, metal elastic modulus were analyzed, the criteria for yielding and fracture of the instrument were discussed .

将根管器械刃部假设为截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

The influence of aberration on measuring sensitivity in critical-angle method of total reflection for focus error detection was described.

摘要分析了在临界角方法探焦技术中像差对测量灵敏度的影响。

The theory of sustainable development not only provides opportunities for the development of sports, but also brings new visual angle resolved the problem of survival resource in face of the development of track and field sports.

山东体育学院田径教研室，山东济南 250002摘要：可持续发展理论的提出为体育的发展提供了机遇，也为我国田径项目发展过程中所面临的生存资源问题提供了全新的解决问题视角。

This paper analyses the sustainable development of track and field sports from the macroscopical and microcosmical angles of view,discusses the sustainable development of track and field sports from the angle of the market and factors influencing the development of track and field sports, in order to provide reference s for the future developing direction and relevant decision-making of track and fields sports.

从宏观和微观的角度分析田径运动的可持续发展，并从市场的角度和影响田径运动发展的诸因素来探讨田径运动的可持续发展，旨在对田径运动今后的发展方向及相关决策提供参考。

In order to predict and control the traction trafficability of a lunar rover, an algorithm for mechanical parameters estimation of lunar soil basing on linear-least squares method was presented, two key mechanical parameters, cohesion and internal friction angle were reversely estimated.

为了预测月球车的牵引力并进行牵引控制，提出了一种基于线性最小二乘法的月壤力学参数估计算法，对内聚力和内摩擦角这两个关键的月壤力学参数进行反求。

In this paper, we study the characteristic of body_wave velocity with incident angle and azimuth variation by using the method of coordinates transformation for TI medium with arbitrary strength of anisotropy and arbitrary spatial orientation.

本文基于坐标变换的方法，研究任意强弱ATI介质中体波速度的角散和方位变化特征。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。