And Athens was until only fairly recent times in human history the most famous democracy that ever existed. I say fairly recent times until you know the American democracy.

而雅典是直到近期为止,一直是人类历史上曾存在过,最著名的民主之城，我所谓的近期,当然是指在美国民主出现之前。

耶鲁公开课 - 政治哲学导论课程节选

So what I want to point out when you're kind of looking at these numbers here, what the significance is, look at that huge difference between what the ionization energies are for what we call those valence electrons, -- those outer shell electrons, those are core electrons there.

我在这里想要指出的是,当大家在看这些数字的时候，最重要的是，要看到这些,巨大的差异,看到所谓价电子，即外层电子的电离能与，1，s，轨道，电离能之间的巨大差异。

麻省理工公开课 - 化学原理课程节选