He urged revival of the slave-trade in the late 1850s, and he developed a theory of what he called warranteeism--w-a-r-r-a-n-t-e-e-I-s-m.

他促成了十八世纪五十年代后期,奴隶交易的复苏,还自己发明了一套理论,名为抵押品主义

耶鲁公开课 - 美国内战与重建课程节选

So in designing it, this was a trade-off that we made.

因此在设计的时候我们要权衡。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

I was part of a huge conference last summer in West Africa on the end of the slave-trade in Ghana, and we had representatives we had people participating in that conference from 15 or 16 different African countries.

我去年夏天曾参加过西非的一个大型集会,纪念是加纳奴隶交易的结束,会议上有来自各国的代表,有15或16个非洲国家的代表,参与的这次大型会议

耶鲁公开课 - 美国内战与重建课程节选

Now, what we learn, both from archaeology and from references in the Linear B tablets is that they engaged-- these cultures engaged in trade to a significant degree.

现在,我们从考古学,以及B类线形文字刻板中的线索得知,这些文明中具有相当多的贸易因素

耶鲁公开课 - 古希腊历史简介课程节选

That's a really a major trade-off in the application.

这就是我们进行调整后的结果。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选