The campaign of eighteen eighty-four between Republican Blaine and Democrat Cleveland was one of the most bitter in American political history.

VOA: special.2010.04.29

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

And so what we ended up doing is the last four weeks of class after we had grounded it in the history of the modern university, understood the structure of it, we had the students select topics that they were really interested in.

所以我们最后选择,在最后四周，在我们了解了,现代大学的历史，理解大学的结构之后，我们让学生们选择一些,他们真正感兴趣的话题。

普林斯顿公开课 - 人性课程节选

But the Mormon Church has established more than four thousand Family History Centers around the world.

VOA: special.2010.06.28

Now think of another product in American history that doubled every decade for four decades, and then imagine that that product became the country's, without question, absolute largest export.

思考下在美国历史中有没有另一种产品曾,有如此辉煌的成就,那么这个产品将毫无疑问地,成为美国最大的出口产品

耶鲁公开课 - 美国内战与重建课程节选

All became hits. This made Justin Bieber the only artist in the history of Billboard magazine to have four singles from his first album among the most popular songs before the albums release.

VOA: special.2010.02.26

The classical hoplite formation then was not the long lived military institution of scholarly tradition, but merely one phase in a history of almost four centuries of slow change towards ever denser and more cohesive heavy infantry formations."

这种方阵的形成,并不是经过长期传承的传统军事制度,只是步兵阵型演变的一个阶段,战阵逐渐向更加紧密坚固的步兵阵型转化,而这个变化持续了约有四个世纪"

耶鲁公开课 - 古希腊历史简介课程节选

The lanky teenager began playing Australian Rules Football just four years ago but has made history by becoming the first player from Africa to join the professional league,the AFL.

VOA: standard.2009.12.17

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