But, it's just a speculation. All right, so now, let's get on and talk about the experiment.

但是这仅仅是一个猜测，嗯，现在，我们继续讨论实验。

麻省理工公开课 - 固态化学导论课程节选

About two-thirds of those went by outright sale, by financial speculation, in now a growing huge American business of the domestic slave trade.

大约有三分之二的人都被,金融投机所买断,被投入一个日益庞大的,国内奴隶贸易的美国商业市场

耶鲁公开课 - 美国内战与重建课程节选