Imagine that--back to this earth-- this Napoleon type of case happened all the time.

我们回到地球上-,假设这种拿破仑案例时常发生。

耶鲁公开课 - 死亡课程节选

So let's look at the first case 2px where we have either the 2 p x or 2 p y type of orbitals that we're combining.

让我们看看第一个情形,我们要组合,或者2py轨道。

麻省理工公开课 - 化学原理课程节选

So in the first case of this first bond here that I've put in a square, what type of a bond is this, is the sigma or pi?

在这第一个键里,我用方框把它标出来了，这个键是什么类型的，sigma还是π？

麻省理工公开课 - 化学原理课程节选