The inner electrons are so tightly bound that they are for all intents and purposes, immobilized when it comes to reactivity.

内部电子被紧紧地束缚着,因此无论怎样，当进行反应时，它都是固定的。

麻省理工公开课 - 固态化学导论课程节选

There may be some sort of metaphysical laws that tie the two things so tightly together that you'll never actually get one without the other.

因为一些形而上学的定律,将两者紧密联系在一起,使你无法把其分离开来

耶鲁公开课 - 死亡课程节选

They are good electron donors because the electrons aren't tightly bound.

它们是很好的电子给体,因为电子没有被牢固地束缚。

麻省理工公开课 - 固态化学导论课程节选

It makes a lot of sense when we look at it energetically, because if we think about a 1 s core electron, that's going to be held really, really tightly to the nucleus.

从能量的观点来看这是非常合理的，因为如果我们考虑一下，1，s，芯电子，它会被原子核束缚得非常非常紧。

麻省理工公开课 - 化学原理课程节选

So the mind, the soul, and the body are obviously very tightly connected.

因此,心灵,即灵魂,和肉体明显是紧密联系的

耶鲁公开课 - 死亡课程节选

So, that means the electrons are tightly bound.

所以那意味着这些电子是被紧紧地束缚着的。

麻省理工公开课 - 固态化学导论课程节选