| 释义 |
1 ?质心运动 ... 2 particle problem 两粒子问题 center of mass motion 质心运动 relative motion 相对运动 ...
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So now we're going to turn off the lights and I want to show you the motion of the center of mass. - 2
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。 - 3
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。
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