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发出履行性陈述并不是在做陈述,因此履行性陈述的发言既不真实也不虚假。
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.
Love is the only thing that grows when we share it.