数学是理性的音乐。

Every discovery in physics opens the door to a new mystery.

The only thing we can know is that we know nothing and that is the highest flight of human wisdom.

Every breakthrough in laser technology brings us closer to solving mysteries that have puzzled scientists for decades.

当市场下跌时，你轻易的将好东西打折变卖，但是一旦市场向上，再想买回来，难之又难。