"And we will continue to do that, no matter what the circumstances are.

VOA: standard.2009.09.06

So in oxygen we have a similar situation where, in fact, we are not going to promote any of the electrons because we have two lone pair electrons no matter what we do.

在氧中，情况很类似，我们不能激发电子,因为无论如何我们都有两个孤对电子。

麻省理工公开课 - 化学原理课程节选

No matter what we do in terms of promotion, we're always going to have three unpaired electrons.

不管我们怎么激发，我们总有3个未配对的电子。

麻省理工公开课 - 化学原理课程节选