So, this all starts, in terms of putting it in its historical context at the turn of the Century, we said we'd start right in on the 20th Century of where chemistry was.

从历史的观点来看,这些都起源于,上个世纪之交,我们说我们从。

麻省理工公开课 - 化学原理课程节选

Some people will say as it began that human rights are thousands of years' old.

有人会说谈到起源,人权应该有几千年的历史了。

普林斯顿公开课 - 人性课程节选