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A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
你们会选择安逸的生活,还是选择一个奉献与冒险的人生?
外交是一门没有永久朋友,只有永久利益的学科。
我们必须拥抱变化,否则就有被淘汰的风险。
一切人类知识都源于经验。