That's the internal representation that python uses for this. If I give it some other character, yeah, it would help if I could type, give it some other character.

为什么输入‘3’返回了其它的东西？,这是python在内部的表示方式，如果我输入其它的字符，是的，如果我能输入，输入其它的字符。

麻省理工公开课 - 计算机科学及编程导论课程节选

Let's bind z eh let's bind z to the-- f if I could type it would help-- say, f of 3. OK?

让我们给z赋值--如果我能打字就好了-,比方说？

麻省理工公开课 - 计算机科学及编程导论课程节选

All right, so that's s p 3 hybridization, but those aren't the only type of hybrid orbitals that we can form. Let's take a look at what happens if instead of combining all four orbitals, we just combine three of those orbitals, and what we'll end up with is s p 2 hybridization.

好了，这是sp3杂化，但这并不是我们可以,形成的唯一类型的杂化轨道,让我们来看看，不是四个轨道结合，我们仅仅结合3个轨道。

麻省理工公开课 - 化学原理课程节选