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任何政治制度的成功都取决于其提供繁荣和正义的能力。
The success of any political system depends on its ability to deliver both prosperity and justice.
你不能双手都戴着接球手套度过一生。你需要能够回馈些什么。
In the world of physics, we often find that the simplest questions are the hardest to answer.