This is because many Americans believe two-dollar bills are lucky, so they keep them.

VOA: special.2010.11.15

If you look at the normal labs that are in many places, you have a lab on Thursday afternoons, and the labs are either two weeks ahead or two weeks behind the lecture material.

如果你了解其他地方,一般的实验室，比如在星期四下午有实验课，这些实验要么是讲座的两周前,要么是讲座的两周后,才进行。

麻省理工公开课 - 媒体、教育、市场课程节选

So when I do the analysis, I want to think about what am I doing here, am I capturing all the pieces of it? Here, the two variables that matter are what's the length of the list, and how many times I'm going to search it?

这里，要关注的,两个变量是列表,的长度以及我要搜索的次数,这种情况下，这个算法赢了？

麻省理工公开课 - 计算机科学及编程导论课程节选

(SAYING) Yulmi says many work 15-16 hours a day, holding two jobs and are underpaid because they are undocumented.

VOA: standard.2010.03.21

But many, particularly two-- bureaucracies and powerful standing military forces-- are characteristics of modern states.

这些变革,尤其是官僚机构和强大的军队,这两方面是现代国家的特征

耶鲁公开课 - 欧洲文明课程节选

There are many significant differences between the two creation stories.

它们之间有很大的不同。

耶鲁公开课 - 旧约导论课程节选

There are many people in academia,outside academia, who divide the world essentially into two.

学术界内外，都有很多人，将世界一分为二。

哈佛公开课 - 幸福课课程节选

The two biggest fears of children in urban Chicago are that snakes and spiders, even though many of these children have probably never seen a snake outside of a zoo in their lives.

芝加哥市区孩子最害怕的两样是,蛇和蜘蛛，甚至这些孩子,从未在动物园以外的地方见过蛇。

耶鲁公开课 - 心理学导论课程节选