- And we can think about why -- essentially we have fluorine and now we're adding another electron. So you can picture that fluorine is going to get larger in this case And that would be true for all of the negatively charged ions.

我们可以想一想这是为什么-,本质上来讲我们现在给氟原子加上了,另外一个电子,因此大家可以想象在这种情况下氟将变大,而且这对于其它负离子也是成立的。

麻省理工公开课 - 化学原理课程节选

So the most basic answer that doesn't explain why is just to say well, the s orbital is lower in energy than the p orbital, but we now have a more complete answer, so we can actually describe why that is.

所以最基本的答案是那没有解释,所以我们事实上可以描述，为什么是那样，但是我们现在有一个更复杂的答案，又是有效电荷量。

麻省理工公开课 - 化学原理课程节选

Right. Now I have two copies of two, but that's why I kept this thing around.

对的，现在我有两份数值，这就是为什么我保持这个东西。

哈佛公开课 - 计算机科学课程节选

Now, why do you need a cell mediated immune response if you have an antibody response?

为什么你还要有细胞免疫反应呢,你已经有抗体应答了啊

耶鲁公开课 - 生物医学工程探索课程节选

Now, why have a story with a sperm as a narrator?

为什么要把精子作为叙述者呢？

耶鲁公开课 - 1945年后的美国小说课程节选

But before telling you about this let me sort of Go through some of the hypothesis that we have and That we are now testing about why the subject is Difficult and why these materials assembled what We have assembled them might be useful.

但是谈那之前我要说说,我们之前的一些假设,我们现在正在测试为什么这个学科很难,以及为什么我们整合这些资料是有用的,我们认为把它们整合起来或许有用。

麻省理工公开课 - 媒体、教育、市场课程节选

Now you might wonder, why do we have dictionaries?

现在你们可能会有疑惑了，我们用字典来干什么呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

Now, why does he have to go back to Ithaca?

为什么奥德修斯要这样做呢

耶鲁公开课 - 古希腊历史简介课程节选

Now, you might have said, gee, why didn't it just assume that I wanted to in fact treat these as strings, and combine them together?

现在，你们可能会认为，伊，为什么Python不假设,我实际上想把这些对象当做字符串一样对待，然后把它们组合到一起呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

All right, so let's go back to electrons configurations now that we have an idea of why the orbitals are listed in the energy that they are listed under, 2p why, for example, the 2 s is lower than the 2 p.

好的我们返回来到电子构型,现在我们有一个思路知道,为什么轨道,以能量列出来，举个例子2s低于。

麻省理工公开课 - 化学原理课程节选