Now I have a wife. So it's gonna be easier for me to see the second one."

VOA: special.2010.06.14

And when we describe this in terms of talking about chemistry terminology, we would call the first one the 1 s, and 1 is in parentheses because we're talking about the first electron there, and we would multiply it by the wave function for the second one, which is also 1 s, but now we are talking about that second electron.

当我们用化学术语来,描述它的时候，我们称第一个为“1s“,括号中的1是因为我们,在谈论第一个电子,而且我们会用它的波函数，乘以第二个,第二个也是“1s“,但是我们现在谈论的是,第二个电子。

麻省理工公开课 - 化学原理课程节选

But think with me just for one second about the idea of progress.

但是请跟我思考一下,进步的观念

耶鲁公开课 - 美国内战与重建课程节选