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

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

The reason it's aluminum is because aluminum has a lower z effective, so it's not being pulled in as tightly by the nucleus, and if it's not being pulled in as tightly, you're going to have to put in less energy in order to ionize it, so that's why it's actually going to have the smaller ionization energy.

原因是,铝的有效核电量更少，所以没有被原子核束缚得更紧，而如果没有被束缚得更紧，你为了电离它所需要注入的能量也就更少，这就是,它的电离能会更低的原因。

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

They're very deep and held very tightly to the nucleus, so we can often lump them together and instead of writing them all out separately, 3s1 we can just write the equivalent noble gas that has that configuration.

它们非常深,被原子核吸得很紧，所以我们通常可以把它们混在一起,而不是把它们写开，我们可以写出氖然后3s1所以,或者任何的一个。

麻省理工公开课 - 化学原理课程节选