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水果品种的多样性就像文化的多样性 - 两者都让世界变得更加丰富有趣。
当你开始思考风格的那一刻,你就迷失了。
The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.
The discovery of the accelerating expansion of the universe was a complete surprise.