This machinery is so precise that a human hair couldn't even pass between the heads and spinning platters, yet it all works in terrific speeds.

这些设备是很紧密的以至于人的头发,都不能在头和旋转的磁盘之间通过，尽管如此，它的运行速度非常快。

哈佛公开课 - 计算机科学课程节选

So another way to think about that is just the rotational kinetic energy of our electron.

或者，这样想,它是，电子旋转的动能。

麻省理工公开课 - 化学原理课程节选