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The selfish gene theory is not a theory about selfishness in the everyday sense. It is a theory about the evolution of behavior.
教育是保护的基础——人们保护他们所理解的东西。
The past is never dead. It's not even past.
If you do not believe in yourself, no one else will.
采矿的未来在于智能化和绿色技术。
好奇心是发现的引擎。