, all right so you have two partners potentially, 4 of you, this should be easy then.

，好，应该还有两个人，你们四个，接下来就简单了。

哈佛公开课 - 计算机科学课程节选

In contrast, if we talk about a double bond, what we're now talking about is having both a sigma bond and also one pi bond. And I apologize, I intended to set this up right before class, but that didn't happen today.

相反，如果我们讨论一个双键，我们现在讨论的是,一个sigma键和π键，抱歉，我应该在课前就把这个装好的，今天没装好。

麻省理工公开课 - 化学原理课程节选