Natural experiments can provide valuable insights into economic questions.

I think it's rarely about what you actually learn in class—it's mostly about what questions you ask yourself.

在登陆NBA的第一个赛季，被问及“在中国打球和在美国打球有什么不同”时，姚明居然说

你在你的玫瑰花身上耗费的时间使得你的玫瑰花变得如此重要。