Based on the conception of instantaneous motioncenter, a new virtual vibration system for dynamic balancing measurement is proposed.
根据瞬时运动中心的概念，提出一种全新的动平衡测量虚拟振动系统。
2
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。
3
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.