We've probably had four major periods in American history of there's one other picture I wanted to put up.

在美国历史上,我们大约经历了四个时期,在我想贴的另一张图片上

耶鲁公开课 - 美国内战与重建课程节选

I was an undergraduate here in 1995 as a freshman, I came in thinking I was going to major in government and sure enough I started off on the track; I'd like history, I'd like government, English, these kinds of things in high school.

995年我作为本科新生进入哈佛，我刚来的时候想主修政治,后来我就沿着这条路走了下去，我喜欢历史，政治和英语，就像高中的时候一样。

哈佛公开课 - 计算机科学课程节选

We've had episodes in our history when real interest rates have made major moves and these movements are very important for what is happening in our lives.

历史上有一些真实事件,实际利率发生很大的变化,这些变化对我们的生活,有非常重要的影响

耶鲁公开课 - 金融市场课程节选