If you look at the history of U.S. Taxes, the very simple history is World War One and World War Two.

如果你看一下美国税收历史，里面提到了一个典型的时期,就是一次世界大战和二次世界大战的时候。

耶鲁公开课 - 金融市场课程节选

- Those of you with backgrounds in history or we've seen -- or remember World War II with technologies that were used in it might know of the Enigma machine, which is kind of the same idea.

你们其中有历史背景的人或者我们看到的-,或记得起的第二次世界大战中使用的,可能知道的英格玛装置，那是一种同样的思想。

哈佛公开课 - 计算机科学课程节选

They did it again, even more decisively in World War Two, and that's how we got progressive taxes.

而二次世界大战时，他们毫不犹豫的，再次提高了对富人的征税，这就是累进税的由来。

耶鲁公开课 - 金融市场课程节选

America is just joining the war effort in Europe.

美国卷入第二次世界大战。

耶鲁公开课 - 1945年后的美国小说课程节选

While he was still in Luxembourg, just before World War II broke out, he emigrated to the United States and finished his career in the Pacific Northwest where he helped make huge quantities of titanium.

他一直住在卢森堡，在二次世界大战爆发前，他移民到了美国,后半生在太平洋西北部,他制备了大量的钛结束了他的事业。

麻省理工公开课 - 固态化学导论课程节选

Or Roosevelt, after World War Two, talking about our humility as a nation in the face of the sacrifice of our soldiers, or Lincoln, or Washington, These are people who understood that they were small parts of something much larger.

第二次世界大战之后，罗斯福总统，也讲过一个国家的谦逊,面对战士的牺牲，无论是林肯还是华盛顿，这些人都很请楚,他们都只是很渺小的一部分。

普林斯顿公开课 - 国际座谈会课程节选

The only other time we've seen a boom like this was right after World War II and that's shown by this line here; that wasn't as big.

我们可以看到,类似的繁荣,只在第二次世界大战之后出现过,就像这条线所显示的,这个增量不大

耶鲁公开课 - 金融市场课程节选