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最好的数学不仅正确,而且具有启发性。
有时候我开始说一句话,甚至不知道会说到哪里。我只是希望能在过程中找到答案。
If you believe that every life has equal value, it's revolting to learn that some lives are seen as worth saving and others are not. We said to ourselves: "This can't be true. But if it is true, it deserves to be the priority of our giving."