Because this is not a good example from the UK,".

VOA: standard.2009.04.10

But this is a good example of what you need to know.

这个例子很好地说明了你需要知道什么

耶鲁公开课 - 基础物理课程节选

Again, boron is a good example. Look, 0.8, 1.36. This is 2p. This is 2s.

硼又可以是一个很好的例子，看，0。,1。36，这是2p层，这是2s层。

麻省理工公开课 - 固态化学导论课程节选