and he knew this the same way that we saw it in the last class, which is when we viewed the difference spectra coming out from the hydrogen, and we also did it for neon, but we saw in the hydrogen atom that it was very discreet energy levels that we could observe.

那就是,当我们看氢原子发出的光谱时，我们也看了氖气,但我们看到,氢原子能级是分立的，这些，在当时,已经被观察到了,他也都知道。

麻省理工公开课 - 化学原理课程节选

We have students come to five hours' class, in the same room.

学生在同样的教室里，上五小时的课。

麻省理工公开课 - 媒体、教育、市场课程节选

All right, now just to get you used to the idea, in every class we're going to have I think the same two people, so Jude is the cameraman; why don't you all wave to Jude.

还要说一下,每节课我们都会,看到这两名工作人员,裘德是摄影师,大家跟裘德打个招呼

耶鲁公开课 - 博弈论课程节选