But shielding is a good way to think about it, and actually, that's what we'll use in this class to sort of visualize what's happening when we have many electrons in an atom and they're shielding each other.

实际上，它也是我们将在课堂上用于,分类形象化的当我们有,很多电子在原子中,它们互相屏蔽时会发生些什么,屏蔽是被使用的名词。

麻省理工公开课 - 化学原理课程节选

They started having mail cars on trains and they started having postal sorting on the train.

人们开始用铁路邮政车,并且在火车上分类整理。

耶鲁公开课 - 金融市场课程节选

And there are real different gradations.

而且在人权问题上，的确有很多不同分类。

普林斯顿公开课 - 人性课程节选

They were speeding the mail so that it didn't have to wait to sort it before it went on the train-- it was sorted while it was moving on the train.

发信速度很快,以致于在上火车之前不再需要,等着分类整理-,可以边坐火车边整理。

耶鲁公开课 - 金融市场课程节选