I asked each of them to bring a book that had informed that question for them, inside or outside of the classroom that they had read or what in Princeton.

我让他们每人带一本书来,这本书该为他们提供了对这个问题的提示,只要是他们在学校里课堂内外读过的都行。

普林斯顿公开课 - 人性课程节选