And if we do, in fact, hit it with light to get the electrons off, it will go back to the straight up in position, or if it gets knocked hard enough it does that, too.

而且如果我们这么做，事实上，用光轰击它以逐出电子，它就会在原位置沿直线返回，或者如果它被撞击的足够猛烈,也会出现上述现象。

麻省理工公开课 - 化学原理课程节选

It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.

让它与大气接触冷却,改变约束，使它继续冷却，然后又再次加热,这就是循环热机，我们以前也研究过，更复杂的机器。

麻省理工公开课 - 热力学与动力学课程节选

What I'd rather have is your interpretation of things like I thought this thing was really interesting and here's why, or I remember back in week two of the class we talked about this issue and it links up with what we're now talking about in week eight, or I just saw something on the news and here's how it relates, and all those sort of things are the way the concept sheets go.

我想看到的是你们自己对于问题的理解,比如我认为这个问题很有趣,原因如下,或是,我想起之前在第二周谈到的问题,和现在第八周正在讨论的内容有联系,或是,我看到条新闻和课程有所联系,这些东西都能写到观点报告里

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选