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对自然的研究是永恒的乐趣。
The study of nature is a perpetual joy.
The true test of a musician is not how they play in concert, but how they behave in rehearsal.
Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
One isn't born one's self. One is born with mass of expectations, a mass of other people's ideas—and you have to work through it all.