We have a zinc plate up here, and we're going to -- in a minute I'll describe how we can probe if electrons are coming off of it.

我们有一块向上的锌板，我们将在一分钟内描述,我们是怎样探测出,是否有电子从上面射出的。

麻省理工公开课 - 化学原理课程节选

Well, duh! That's like asking, when I've eaten up all the food on my plate, is there any food left on my plate?

好的,这就像是在问,我把盘子里的东西吃光了,盘子里是否还有东西

耶鲁公开课 - 死亡课程节选