本文在分析了约束的普遍特性的基础上，讨论了“约束释放原理”在研究非自由质点系统动力学问题中的作用和局限性；

On the basis of analysing the general characteristics of bind this paper discusses the effect and limitation of "release principle of bind" in studying the dynamics of non-free particle system.

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固相质点的偏振特性与均匀弹性固体自由界面上的瑞利波的偏振有某些类似之处；

The polarization property of material point of solid phase has some similarities with the polarization of Rayleigh Wave in free surface of uniform elastic solid;

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运用质心运动定理，分析了质点在可自由移动的凹曲面上滑下时，质点对惯性系的运动轨迹方程。

The possible tracks of a particle BXm_(2), sliding down along a free movable concave surface with the mass m_(1) are analyzed.

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Conversely, if you get an answer and it doesn't seem to make sense, then you've got to go back and ask, am I violating some of the assumptions, and here you will find the assumption that the particle had that acceleration a is true as long it's freely falling under gravity but not when you hit the ground.

反过来说,如果你得到一个结果,发现似乎是错的,那么你就应该回过头来问问自己,我是不是违反某些前提了,这个模型中,你就发现,只要质点在重力作用下自由下落,质点具有加速度a的前提是正确的,但是落地后就不成立了

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