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The actions of men are the best interpreters of their thoughts.
数学家是能在定理间找到类比的人;更好的数学家能在理论间看到类比;而最优秀的数学家能注意到类比之间的类比。
You can say so much with pictures that you don't need to say in words.
当你尝试新事物时,你永远不知道会发生什么。这一切都是实验性的。