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I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.

過去已經(jīng)寫就，墨跡已干。

最重要的是對(duì)你所做的事情充滿熱情。