And, this one here, some of you might recognize, is dichlorodifluoromethane. It's also known as a CFC.

而且在这些当中有些你或许认识，是二氯二氟化碳，它也是众所周知的氟利昂。

麻省理工公开课 - 固态化学导论课程节选

And one problem is that "For depression" is that there's too little of a neurotransmitter known as serotonin.

抑郁症的问题就在于,缺乏一种叫做血清素的神经递质

耶鲁公开课 - 心理学导论课程节选

Because one of the things that you want to do as a good designer is to basically map a new problem into a known domain.

因为如果你们,想做一个好的设计师,最基本的事情之一就是学会,把没碰到过的问题映射到已经领域中去。

麻省理工公开课 - 计算机科学及编程导论课程节选

And one factor in Parkinson's is too little of a neurotransmitter known as dopamine.

引起帕金森症的一个病因,便是严重缺乏一种叫做多巴胺的神经递质

耶鲁公开课 - 心理学导论课程节选