And when we talk about intensity in terms of units, we usually talk about watts, so if you change your lightbulb, usually you see the intensity in terms of watts.

当我们讨论强度的单位时，我们经常用瓦特，所以如果你更换灯泡，你通常会看到,以瓦特为单位的强度值。

麻省理工公开课 - 化学原理课程节选

One of the best descriptions I've ever read of why slavery persisted, of why people defended it, and why people went to war for it, came before the war, in 1857, in a speech by the African-American woman, novelist, writer, poet Frances Ellen Watkins Harper.

我曾读到的一段比较精彩的论述,关于为什么奴隶制度留存了下来,为什么人们为其辩护,为其而战,在1857年,战争前夕,在一个非裔美国女人的演讲中,她是小说家兼作家兼诗人,弗朗斯·伊莲·瓦特金·哈伯

耶鲁公开课 - 美国内战与重建课程节选