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The only thing that I'm addicted to is winning.
数学不是一项观赏性运动;要理解它,必须积极参与其中。
The best way to cheer yourself up is to try to cheer somebody else up.
A man knows when he is growing old because he begins to look like his father.
实现不可能的唯一方法,就是相信它是可能的。