That is why we don't worry about the motion of the nucleus 1 because the ratio of mass is about 2,000 to one.

这就解释了为什么我们不担心,原子核运动起来,因为原子核和电子的质量比约为2000：

麻省理工公开课 - 固态化学导论课程节选

But a point I'm trying to make is, it sounds like anymore computers have gotten so blazingly fast, why should you worry about it?

但是这里我要讲的一点是，在任何一台计算机,都能这么快的运算的情况下，我们还管效率这个问题干嘛呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

And that's precisely why we got to worry about the soul.

这正是我们要担心,灵魂的地方。

耶鲁公开课 - 死亡课程节选

Keep in mind we do have this p orbital here and it's coming right out at us. And this p orbital is here, but it's empty, it doesn't have any electrons in it, that's why we don't have to worry about it in terms of getting our electrons as far away from each other as possible.

他们程120度角互相远离,这样它们离得最远，记住我们这里确实有个p轨道，它朝向我们，这里有个p轨道，但它是空的,里面没有电子,这就是为什么我们在考虑。

麻省理工公开课 - 化学原理课程节选

That's why it's using set braces, so don't worry about that.

这也是为什么字典用了集合的括号的原因，因此对这一点不用担心。

麻省理工公开课 - 计算机科学及编程导论课程节选