If you had more than fifty minutes, you could actually make ample use of it.

如果你有超过50分钟的教学时间，你大可尝试去做。

耶鲁公开课 - 文学理论导论课程节选

Fifty-two of you so far, so what we need are more people to get clickers, because some of these polls will be interesting to do.

目前为止有五十二个人,我需要更多的人能有个表决器,因为这样的投票会很有意思

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

From the standpoint of your genes, you dying for the life of three brothers is an excellent compromise 50% because the genes replicate by fifty percent more.

从你自身基因的角度看，你为了三个兄弟牺牲自己,是非常好的折中,因为基因复制超过。

耶鲁公开课 - 心理学导论课程节选

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