We have a lot of people revolutionizing the world because they've never had to present a working model.

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We have a lot of people revolutionizing the world because they've never had to present a working model.

我们有很多人在改变世界,因为他们从来没有提出过一个可行的模式。

-- Charles F. Kettering 查尔斯·凯特林

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