That would that would give rise to a perpetual motion machine, breaking of the second law. It can't happen.

否则就会使,得永动机出现，打破第二定律那是不可能的。

麻省理工公开课 - 热力学与动力学课程节选

I don't think there has ever been a major motion picture about a financial person who ended up a philanthropist.

我觉得好像没有一部正儿八经的电影里,金融业者最终成为了慈善家。

耶鲁公开课 - 金融市场课程节选

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