Get busy, give charity. It's a problem that never goes away, so you can never rest.

忙碌劳作，给予施舍，这是一个永远不会消失的问题,所以你永远没办法停歇。

耶鲁公开课 - 旧约导论课程节选

You should never get the names of hybrid orbitals wrong because it's very straightforward.

你们不会搞错杂化轨道的名字,因为它们都是十分直接的。

麻省理工公开课 - 化学原理课程节选

There're also changes of what you can teach, extends what you can teach, because you can get to concept which are really quite sophisticated that you will never teach it at the introductory level, because the math is the least that you can make it quantitatively, because you have a visualization that shows physically what's going on.

同时这也能改变,教学内容，你能教授的程度，因为你可以定义,那些通常很难的,你在入门阶段都不会遇到的,抽象阶段，因为数学是你最不能,用定量手段来解决的，因为你有一个直观过程,知道什么正在进行。

麻省理工公开课 - 媒体、教育、市场课程节选