那就不要说吧。哪里有长度为零的线段? 你自己搞不清的东西往别人嘴里塞, 有意思吗？

来源: stonebench 于 2023-12-24 21:34:02 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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