We can actually have any radius, but some radii just have much, much smaller probabilities of actually being significant or not.

非常非常小，以至于,无关紧要,我们今天。

麻省理工公开课 - 化学原理课程节选

You know when you add 2 polar forms, you add the radii together, you don't add the angles together, you need to do it in Cartesian form.

表示形式的不同理解，返回给你了不同的值，这也就带来了一系列的问题，第二个问题是。

麻省理工公开课 - 计算机科学及编程导论课程节选

This is ionic radii with a noble gas configuration.

这是稀有气体的离子半径。

麻省理工公开课 - 固态化学导论课程节选

So, these are two different definitions of how to think about atomic radius, but really what you find when these are measured is they come up with almost the identical values, so there are tables, you can look up of atomic radii and see these values, and you can trust them that, they work for both this definition and for this definition here, in most cases.

这就是,关于原子半径的两种不同的定义，但实际上你会发现按照这两种方法,测量出的值是相等的，因此有很多关于原子半径的表格，你可以通过查阅它找到这些值，你可以相信这些值，它们对于这两种定义都是适用的，在大多数情况下。

麻省理工公开课 - 化学原理课程节选

It's kind of ironic that we put this in the same lecture as we talk about atomic radii, which we also call r, but they're two different r's, so you need to keep them separated in terms of what you're talking about.

有点讽刺的是,我们在同一堂课里还讨论过了原子半径，它也是用，r，表示的，但是它们具有不同的意义，因此大家需要注意区分它们,弄清楚我们讨论的是哪一个。

麻省理工公开课 - 化学原理课程节选

We have energies. We have radii.

我们还学了能量，学了半径。

麻省理工公开课 - 固态化学导论课程节选

r+ And let's say that sodium has a radius, r plus, r- and chlorine has a radius, r minus, when r is very large in comparison to the radii of the ions, I don't need to draw them this way.

让我们假设钠有半径，是，氯也有半径，是，当r比离子半径大很多的时候，我不需要这样来描述。

麻省理工公开课 - 固态化学导论课程节选