So if we draw the 2 p orbital, what we just figured out was there should be zero radial nodes, so that's what we see here.

如果我们画一个２ｐ轨道，我们刚才知道了是没有径向节点的，我们在这可以看到。

麻省理工公开课 - 化学原理课程节选

So I think, at least when there's the need to be careful-- maybe we don't normally have a need to be careful-- but when there's the need to be careful, we should say, talk of the mind is a way of talking about the P-functioning of the body.

所以我认为,至少在需要严谨的时候,也许我们并不常需要如此严谨,但是当我们需要谨慎时,我们应该会说,心灵是表达,肉体人类能力的一种方式

耶鲁公开课 - 死亡课程节选

So it already should make sense why we have that p orbital there, in order to form a pi bond, we're going to need a p orbital.

这里有p轨道是很合理的,为什么我们在这里有P轨道，为了形成一个π键，我们需要一个p轨道。

麻省理工公开课 - 化学原理课程节选