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Necessity is the mother of all invention.

-- Albert Einstein 爱因斯坦

需要是一切发明之母。

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The road to success is not a path you find but a trail you blaze.

Hope cannot be said to exist, nor can it be said not to exist. It is just like roads across the earth. For actually the earth had no roads to begin with, but when many men pass one way, a road is made.

When I have pointed out one corner of a square to anyone and he does not come back with the other three, I will not point it out to him a second time.

Stay hungry, stay foolish.

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