The examples we've done so far have been pretty straightforward, so we haven't needed to use formal charge to make this kind of decision.

我们之前做过的例题,都是非常简单直接的，因此我们还不需要,用形式电荷来做这种决定。

麻省理工公开课 - 化学原理课程节选

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