Or,she can let you try a "single origin" chocolate grown in only one area of the world.

VOA: special.2010.02.17

So, if we take a look at what a single bond is, and let me grab some molecules here.

如果来我们看一下单键，让我拿个分子。

麻省理工公开课 - 化学原理课程节选

What we need, well, let me tell, is no single literacy.

不仅仅是简单的文化素养。

麻省理工公开课 - 媒体、教育、市场课程节选

In principle, we could play this with the whole class, but let's single out a particular row of the class so I'm going to come down here and I guess eventually, well I'll grab it in a minute.

理论上,我们可以全班一起做这个博弈,但我要选出特定的一行,我先走下来,我觉得,我很快就能挑到人

耶鲁公开课 - 博弈论课程节选

So let's think about how we can classify single and double and triple bonds, which is what we're really used to dealing with in terms of these sigma bonds and these pi bonds.

让我们想想怎么来分类单键双键,和三键，这在我们在考虑sigma键,和π键是很有用的。

麻省理工公开课 - 化学原理课程节选