城市是一个我们必须小心对待的生命有机体

In the depth of winter, I finally learned that within me there lay an invincible summer.

Economics is at its best when it helps us solve real-world problems in a rigorous and transparent way.

股票市场充满了知道一切价格但对价值一无所知的人。

文学是社会的镜子，反映了它的美德和缺陷。