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It is proved that the model of Hertz, Capon and Lindel"of areidentical to Vakonomic model while the model of H"older, Pars andChaplygin are identical to Chetaev's model. The fact thatVakonomic model and Chetaev's model exist simultanously can betraced back to the early days of non-holonomic mechanics. These twomodels cause two problems the d- and - permutable problems.

论证了Hertz， Capon和Lindel"of的工作与Vakonomic模型相吻合，而H"older， Pars和Chaplygin的工作与Chetaev模型相吻合，Vakonomic模型和Chetaev模型两类模型并存的局面可以追溯到非完整力学发展的初期。1mm说明了伴随两类模型并存的现象而出现的两个问题 d-交换性问题和-交换性问题。

The fourth part is the carry-over problems in the reform. It provides corresponding critical thinking problems and key points.

第四个部分阐述了改革方案的实施结果以及改革中尚存在的遗留问题，提供了需进一步解决的问题和关键要点。

The Green's function in complex domain is introduced to turn the mixed boundary value problems of the fluid potential to the problems of Cauchy's dual integral equation.

文中采用了复域内格林函数解法，将势函数的Herbert问题转化为对Cauchy型奇异积分方程的求解。

Singular perturbation theory and method for solving nonlinear problems is an important tool on the origin of celestial mechanics and nonlinear vibration problems,and its advantage is enough to give the right solution for structural analysis.

奇异摄动理论和方法是求解非线性问题的重要工具，它起源于对天体力学和非线性振动问题的研究，它的优点是能够给出足够正确的解的解析结构。

The entire flight process is the rocket's flight mechanics and celestial mechanics of the process, and sometimes is a typical rocket flight mechanics problems, and sometimes is a typical celestial mechanics problems.

整个飞行过程是火箭飞行力学与天体力学的过程，有时是典型的火箭飞行力学问题，有时是典型的天体力学问题。

The key problems of peasants in China today have been become problems of right centering on equal right.

当代中国农民的根本问题已经凸显为以"平等权"为核心的权利问题。

Of course, we still have problems, the central and local relations, we still have problems.

当然，我们仍然有问题，中央和地方的关系，我们仍然有问题。

One method is to change the problems of estimating complex two-dimension sinusoids into the problems of estimating characteristic polynomial coefficients.

一种方法是将复杂的二维正弦波参数估计问题巧妙地转换成一个特征多项式系数估计问题。

Traffic flow has a characteristic of time series. Similarity measurement is one of the important problems in time series clustering problems.

交通流数据具有时间序列特征，相似性度量问题是时间序列聚类中的最基本的问题之一。

The majority of chiropractic work is related to back and neck problems, and treatment is usually more effective for short-term problems than for longer-term conditions.

大多数脊医的工作是有关的背部和颈部的问题，和治疗通常是更有效的短期问题较长期的条件。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。