They talked about the real world that is outside, that is dirty,impure,profane versus academia, which is lofty,idealistic,sacred.

他们将外面的世界看成是现实，是肮脏的，不洁，被亵渎的，而学术界，则是崇高的，有理想的，神圣的。

哈佛公开课 - 幸福课课程节选

Very idealistic, but that's not the way the world works.

都是理想气体，而非实际的状态。

麻省理工公开课 - 固态化学导论课程节选