Now formally I could have had this pointing off to another object containing 4, but that just seemed excessive, right?

当然我可以正式的把它指向,另外一个含有4的对象，但这有点多余对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选

The reason is because we already have a full valence shell for our hydrogen, it doesn't want any more electrons.

原因是因为我们的氢,已经有一个排满的价壳层了，它不再需要多余的电子了。

麻省理工公开课 - 化学原理课程节选

There's no more 2 p orbitals to put it into, so we're going to actually have to double up.

现在并没有多余的2，p，轨道来放它，我们只能在其中一个，2，p，轨道上放上两个。

麻省理工公开课 - 化学原理课程节选