So, what we do as our seventh step is then figure out if we have any extra valence electrons left at all.

那么，第七步要做的是看看,我们还有没有剩下的价电子。

麻省理工公开课 - 化学原理课程节选

So, seven asks us if we have any valence electrons left, and how many valence electrons do we have left?

那么，第七步问我们是否还有价电子剩下，我们剩下了几个价电子？

麻省理工公开课 - 化学原理课程节选

And step seven is how many electrons do we have left over that are going to go into lone pairs? How many?

而第七步是我们剩下,多少电子成为孤对电子？多少？

麻省理工公开课 - 化学原理课程节选