Buyers of e-books get a good deal: Traditional hardcover books often cost around twenty-five dollars.

VOA: special.2009.07.24

How do you deal with that trade-off where you absolutely need an ad sales force but at the same time, if one person at a time, you just can't say let's go out and hire five good engineers or five good ad sales people and not have them be great?

如何做出选择，如何取舍,当你急需一批销售人员，但如果只碰见一个合适的人选，你不只能因此去找,5个差不多的工程师,或者5个差不多的广告销售？

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

Some people argued that there are certain things that are just categorically wrong even if they bring about a good result, even if they saved five people at the cost of one life.

有些人认为,某些行为反正就是绝对错误的,即便该行为产生了好的结果，即便能牺牲一人挽救五人性命。

耶鲁公开课 - 公正课程节选

"I think we're on a very good path to making a sea-change in our missile defense posture within the coming three-to-five years."

VOA: standard.2010.03.26

If you had five slaves and a good piece of land in Alabama in 1820, you might very likely have fifty slaves and a hell of a lot more land a decade later.

820年,如果你在阿拉巴马州,拥有五个奴隶和一块肥沃的土地,十年后你很可能就会拥有五十个奴隶,以及更多的土地

耶鲁公开课 - 美国内战与重建课程节选