Rapping could be described as speaking or singing words at a fast speed over music with quick beats.

VOA: special.2009.10.14

So, that is just a quick example for some of you, you might be very familiar with ion channels, others might not know what these are, so I'll just tell you quite briefly that ion channels are these very massive transmembrane proteins.

这对你们中的某些人来说仅仅是个小例子，有些人可能已经非常熟悉离子通道这个概念了，但有些人可能还不清楚，那么就让我来简单地介绍一下离子通道,就是这些巨大的跨膜蛋白。

麻省理工公开课 - 化学原理课程节选

We'll be dealing with this in some depth, but I'll give you one quick example.

在以后的课里我们也会讨论到这个问题，但现在我可以先给你们一个小例子。

耶鲁公开课 - 旧约导论课程节选