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The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
If you don’t believe in love, then what’s the point of living?
最好的故事是那些让你有所感受的故事。
"The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'"
"A book is a gift you can open again and again."