So now that we have enough practice drawing Lewis structures let's talk about actually figuring out this formal charge.

那么现在我们已经做了足够多的画路易斯结构的练习,让我们来讨论一下如何得出形式电荷。

麻省理工公开课 - 化学原理课程节选

So let's do a little practice run through this.

让我们先练习一下。

耶鲁公开课 - 新约课程节选

So let's see this in practice.

让我们在实践中看看这个。

哈佛公开课 - 计算机科学课程节选