Second of all, there's generally an account of the historical circumstances that are leading to the treaty: so some kind of historical prologue.

第二个，交代一下,签订契约的，大的历史环境,也就是，历史开场白。

耶鲁公开课 - 旧约导论课程节选

Well, in recent times, I mean,9/11 was a really dramatic event in world history here.

近期的话，9/11是美国历史上惊天动地的大事件。

911事件的影响 - SpeakingMax英语口语达人

So political philosophy is not just some kind of strange historical appendage attached to the trunk of political science; it is constitutive of its deepest problems.

所以政治哲学并非只是,奇怪的历史附属,依挂在政治科学的大主干上;,它是其最深层问题的本质。

耶鲁公开课 - 政治哲学导论课程节选

Listen, the two periods in American history 1945 1890 to 1945 The economy suffers 3 contractions of 5 percent, 15% 2 of 10, and 2 of almost 15 percent.

听好，美国历史上的两大时期,第一时期是从1890到5,经济遭受过三次紧缩率为5%的经济紧缩，两次10%，还有两次高达。

斯坦福公开课 - 经济学课程节选

We have probably four great reform periods in American history.

我们美国历史上约有四个大改革时期

耶鲁公开课 - 美国内战与重建课程节选