It would be far nearer the truth to say that some are born with saddles on their backs and others booted and spurred to ride them."

这样说也许更贴切,有些人生来就烙有奴隶的印记,而有些人生来就是统治他们的"

耶鲁公开课 - 美国内战与重建课程节选

Suddenly they do the Doppler effect where they turn their backs to you, in a way, and they're marching away from you and you hear very little sound.

突然,他们也产生了多普勒效应,当他们转身背对你时,当他们背离你前进时,你会听到一种很微弱的声音

耶鲁公开课 - 聆听音乐课程节选

We all know people who we thought to be our friends but we found out that they were talking behind our backs, or that they were operating to deceive us in some way or another.

我们都知道,原认为是朋友的人,却被发现,在我们背后讲坏话，或是想要,以任何方式欺骗我们之类的事情。

耶鲁公开课 - 政治哲学导论课程节选

Your brain backs itself up.

你的大脑会自己备份。

耶鲁公开课 - 心理学导论课程节选

You don't see advertisements for participation in commercial real estate like this because the government would be on their backs if they did it.

你不会看到,投资商业地产DPP的广告,因为如果这样,政府会陷入困境

耶鲁公开课 - 金融市场课程节选