But if you say why are they so different from humans that they don't.

但是如果你问，为什么它们与人类,如此不同？，为何它们就没有这些。

普林斯顿公开课 - 人性课程节选

So, why don't you take a look at this and tell me which are possible for a 2 s electron in a lithium atom where z 3 is going to be equal to three?

你们为什么不看一下这个然后告诉我对,于一个锂原子中的2s电子哪些是可能,的？它的有效电荷量,可能等于？

麻省理工公开课 - 化学原理课程节选