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"You must be the change you wish to see in the world."
I don't rap for dead presidents. I'd rather see the president dead.
数学不是关于数字、方程、计算或算法的:它是关于理解的。
书是一面镜子:如果一只猿猴往里看,使徒不太可能往外看。
The only person you should try to be better than is the person you were yesterday.