When we have just a single bond in them molecule, you have all the free rotation you want, you can just spin it around, there's nothing keeping it in place.

当我们在分子力只有一个单键时，你可以随意旋转，你可以让它转起来，没有什么东西能固定住它。

麻省理工公开课 - 化学原理课程节选

When you live together with Americans, so with English people.

当你和美国人住在一起的时候，相当于说英语的人。

英语学习就要这样 - SpeakingMax英语口语达人

So, when I threw that thing up and you caught it, what you are doing mentally was immediately figuring out where it started and at what speed.

所以当你接住我抛出的物体时,你大脑里的反应就是,立刻弄清它的初位置以及初速度

耶鲁公开课 - 基础物理课程节选

Of course, you can imagine the thoughts of Louis XVI as they were cutting back his hair to await the fall of the guillotine on the 21st of January, 1793.

你可以想象下在1793年1月21日这天,当人们拽住路易十六的头发,等待断头台下落时他会想些什么

耶鲁公开课 - 欧洲文明课程节选