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一个好的数学家是能看到定理之间类比的人;一个伟大的数学家是能看到类比之间的类比的人。
A good mathematician is someone who can see analogies between theorems; a great mathematician is someone who can see analogies between analogies.
The teacher who is indeed wise does not bid you to enter the house of his wisdom but rather leads you to the threshold of your own mind.
我希望被人们记住是一个有所作为的人。
过去永远在那里,但它不是唯一存在的东西。
The most important thing is to keep thinking, keep questioning.
如果中原真的能消除战乱,我们两个老头子又何妨老死在戍边之地。