So, normally at this point, we do actually start class with a little bit of history from alchemy to modern chemistry, but I decided to skip that this year.

通常在这个时候,我们要从一些从炼金术,到现代化学的历史出发正式开始我们的课程。

麻省理工公开课 - 化学原理课程节选

You spend a lot of time talking about the transition between alchemy and modern chemistry.

在高中化学你很多时间是花在,了解从炼金术到化学的改变上。

麻省理工公开课 - 化学原理课程节选

So it might, if men had not found out" and here's her phrase worth remembering-- "a fearful alchemy by which this blood can be transformed into gold.

如果人们还没意识到的话,的确应该这样,这里有一段应该记住,"那是一种可怕的炼金术,将鲜血血炼成黄金

耶鲁公开课 - 美国内战与重建课程节选

A fearful alchemy that's a useful definition of slavery.

可怕的炼金术,那是奴隶制的一个有建设性的定义

耶鲁公开课 - 美国内战与重建课程节选