有些时候你必须去挑战伟大。。
不要害怕新的竞技场。
Time is a continuous entity that includes the past, present, and future.
没有充足的食物供应,今天所知道的文明就不可能进化,也不可能生存。
The more you subtract, the more you reveal.
The best economic research is often interdisciplinary.