其实是充分，必要，充分必要条件的区别。。。这样的讨论其实很有价值，谁都可能会在某个点出现逻辑漏洞

来源: 两女宝妈于 2025-12-22 09:42:16 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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