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A good mathematician is someone who can see analogies between theorems. A great mathematician is someone who can see analogies between analogies.
"The art of the novel is the art of being simultaneously inside and outside of things."
生活是一场冒险,每一个挑战都是成长的机会。
You don't have to be perfect to be a good baker.
光波,无论是以太波还是其他波,在所有情况下都是时间上的周期性过程。