So a lot of teaching and learning can be thought as less synchronic activities and more diachronic one.

所以很多教学可以被看成是,不限于一时的而有历时变化的。

麻省理工公开课 - 媒体、教育、市场课程节选

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