So the 3 s 1, or any of the other electrons that are in the outer-most shell, those are what we call our valence electrons, and those are where all the excitement happens.

它们是经常发生激发情况的,那也是我们所看到，我们称之为价电子，它们是经常发生激发情况的。

麻省理工公开课 - 化学原理课程节选

Now, we're left at the point that we're so often left what's the point of all of this?

现在，让我们看到经常关注的这些点,这里是什么意思呢？

耶鲁公开课 - 弥尔顿课程节选

And when we talk about intensity in terms of units, we usually talk about watts, so if you change your lightbulb, usually you see the intensity in terms of watts.

当我们讨论强度的单位时，我们经常用瓦特，所以如果你更换灯泡，你通常会看到,以瓦特为单位的强度值。

麻省理工公开课 - 化学原理课程节选

So leadership is kind of a big word that you see written probably too often these days, in too many newspaper articles, and it probably comes up in too many Yale classes, and I don't claim to know anything about leadership.

领导力这个大词,最近一直都很火啊,我们经常能在报章中看到它,在耶鲁大学的课堂里也能经常听到,我不敢说对领导力有多么深刻的见解

耶鲁公开课 - 博弈论课程节选

dot slash hello" runs the program what do we often see if you omit -- little sanity check -- the "dot slash" ?

，/hello“是用来运行程序的，我们经常看到的,如果你省略--作为一点提醒--那个“，/“呢？

哈佛公开课 - 计算机科学课程节选