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The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
The night is a mirror, and it shows you what you’re afraid of.
当你停止学习的那一刻,你就停止了成长。
I don't believe in God, but I miss Him.
人类的进步和胜利全靠发自内在的力量。
你有敌人?很好。这说明在你的生命中的某个时刻,你曾经呐喊过。