center-of-mass motion的意思|示意

The artical analyses the stability of the bicycle from both the motion of mass-center and the gyroscopic action of bicycles.

本文分别从质心运动和车轮的回转效应来分析自行车的稳定性。

So I mentioned to you that the motion of the center of mass is very uniform in the absence of external forces, and that I can demonstrate for you again with the air track.

我向你们提到过,重心的运动是稳定的,若不受外力，我可以再次演示,在空气轨上。

As to the conservation of motion of center of mass, the method of absolute coordinate system is generally used in the teaching meterials of theoretic mechanics.

对于质心运动守恒问题，理论力学教材中一般用绝对坐标法进行计算。

So now we're going to turn off the lights and I want to show you the motion of the center of mass.

我们要关上灯，我想给你们展示，质量重心的运动。

And ultraviolet light will interact with that little ball, the center of mass, and when I then make it dark, you will only see the motion of the center of mass.

这紫外线光可以，与小球互动，也就是质量重心，当周围暗下来，能看到质量重心运动。

Thus large translation of atoms mass center motion is realized.

从而可实现较大的原子质心动量交换。