"My wife and kids,you know, we were all crying the other day when we saw it on TV,"

VOA: standard.2010.01.18

So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.

比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。

麻省理工公开课 - 化学原理课程节选

Why is it when you saw this, you didn't realize it's the same problem?

为什么当你们看到这个时,没有认识到这其实是同一问题

耶鲁公开课 - 基础物理课程节选