The novel is a mirror walking down the road.

Sometimes you put walls up not to keep people out，but to see who cares enough to break them down.

The first lesson of economics is scarcity: There is never enough of anything to satisfy all those who want it. The first lesson of politics is to disregard the first lesson of economics.

科学要求一个人付出他的一生。

You have to be present in the moment.

材料有自己的智慧。