新概念要有新的实质。象客观的观察这种新＂概念＂，是没有意义的，数学上的空集，等同于已婚单身汉。

来源: QualityWithoutName 于 2025-08-28 09:47:14 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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