看了您以前的文章。吴文北说他爸：巴黎好还是北京好，这点小账你都算不过来，你还当什么数学家？

来源: chezclement 于 2018-06-06 21:38:31 [旧帖] [给我悄悄话] 本文已被阅读：次

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