What was neat about it is before that time, the predominant species to use for air conditioning or refrigeration was ammonia.

在这之前是很整洁的，之前最主要的用于空调或者冰箱的,物质是氨。

麻省理工公开课 - 固态化学导论课程节选

So the strong classical conditioning stories about fetishes and fears sound silly and extreme and they probably are but at the same time classical conditioning can be used at least to shape the focus of our desires and of our interests.

用经典条件作用来解释恋物癖和恐惧,听起来很蠢也很极端,或许是这样,但至少经典条件作用,能够使我们产生,对欲望和兴趣的关注。

耶鲁公开课 - 心理学导论课程节选