So, let's write this one electron orbital approximation for berylium, that sounds like a pretty complicated question, but hopefully we know that it's not at all, 1s22s2 it's just 1 s 2, and then 2 s 2.

所以让我们写出,铍的单电子轨道近似，那听起来像是一个更为复杂的问题，但是希望我们知道它一点都不是，它仅仅是。

麻省理工公开课 - 化学原理课程节选

So tone poems are one in movement, and we have got other kinds of genres in music.

交响诗都是单乐章的,所以我们又了解到一种音乐风格

耶鲁公开课 - 聆听音乐课程节选

Okay, so which is worse: polyunsaturated fat, monounsaturated fat, or both are pretty good for you?

请回答哪个更有害,多不饱和脂肪,单不饱和脂肪,或者是两个都对健康有益

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

These are all one electron atoms, and they are gas, a single atom.

这些都是单电子原子，它们都是气体，都是单原子。

麻省理工公开课 - 固态化学导论课程节选