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When you are young, you think that the world is a place where you can live as you choose. But as you get older, you realize that the world is a place where you have to live as you must.
现在如果天下的人都相信鬼神能赏贤罚暴,那么天下怎么还会混乱! 
Learn to control your emotions to master your life.
The true power of an algorithm is not in its speed or efficiency, but in its ability to reveal the hidden structures of the problems it addresses.
丰收的果实很多,但收获的人却很少。