盛极必衰，此消彼长，万物皆如此！谢谢老师的文章，提出了一个很令人深思的问题。

来源: Palmbreeze 于 2017-12-26 06:36:42 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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