When I last explained this to Professor Shiller, ? he said, well what about insurance companies?

他是否还记得，他说，那保险公司呢？

耶鲁公开课 - 金融市场课程节选

This analysis has explained why people don't always help others in need.

这个分析解释了为什么人们,并不总是帮助有困难的人。

耶鲁公开课 - 心理学导论课程节选