Essentially what you have is bonds resulting from the pairing of unpaired electrons.

本质上就是由于,未配对电子配对导致的成键。

麻省理工公开课 - 化学原理课程节选

Now it's all electronic and it's done by the Internet, but it's the same thing.

现在一切都是电子化操作,通过互联网就可以实现，但本质上还是一样的。

耶鲁公开课 - 金融市场课程节选

This should make sense because if something has a low ionization energy, that means it's not very electronegative, which means it's going to be a lot happier giving up electron density, which is essentially what you're doing -- when you're forming covalent bonds is you're sharing some of your electron density.

这应该是合理的,因为如果某物的电离能很低，这也就意味着它的电负性也不高，那么它就会更愿意,放弃一定的电子密度，而本质上这正是你在,形成共价键时所需要做的,分享你的一些电子密度。

麻省理工公开课 - 化学原理课程节选

Inside here you have electronic states.

更本质的原因是电子的状态。

麻省理工公开课 - 固态化学导论课程节选