And, at one point in time, he laments the end of the old Latin world and the B.C. world, when people could have these child slaves.

在某一时刻，他为拉丁时代和公元前时代的结束而哀悼，那时人们可以拥有小孩做奴隶。

耶鲁公开课 - 1945年后的美国小说课程节选

One peculiar property of this--incidentally, at every point of time this thing holds, this is time to maturity.

顺便说一下这个公式一个特别的性质,这个等式在任何时候都成立,这是贷款剩余期限

耶鲁公开课 - 金融市场课程节选

Other one says, maximize the time of flight and you point a cannon like this.

另一种是,让飞行时间最长,像这样进行瞄准

耶鲁公开课 - 基础物理课程节选