The law of variable mass motion of a soft rope is studied.

研究了一种变质量柔绳上升和下降的运动规律。

youdao

That is why we don't worry about the motion of the nucleus 1 because the ratio of mass is about 2,000 to one.

这就解释了为什么我们不担心,原子核运动起来,因为原子核和电子的质量比约为2000：

麻省理工公开课 - 固态化学导论课程节选

This spring is getting squashed on either side, and it'll squash by certain amount x, that depends on your mass, and that x will be turned into a motion of a needle and that'll read your mass.

这个弹簧两边都会受到压缩,压缩量为 x,它由你的质量决定,x 会转换成指针的运动,你从而可以读数

耶鲁公开课 - 基础物理课程节选

Proposing a motion backing mass strikes to the TUC conference, Unison leader Dave Prentis revealed he was giving 9, 000 employers formal notice that his union's 1.1 million members would be balloted.

BBC: Unions call 'national day of action' over pensions

The first mass-consumer use of motion sensing came twelve years later in 2006, and was entirely for fun and games, in the Wii remote controller from Nintendo.

FORBES: Exponential Growth in Small Machines - Don't Fear, They're Here to Protect You

As part of a broader strategy, Xsens now offers IP originally developed for professional (B2B) applications of 3D body motion tracking using wearable motion trackers for mass market application in the consumer electronics industry.

ENGADGET: Xsens teases wearable 3D body sensors that won't cost, will track an arm and a leg (video)