盛极必衰，衰极而盛，是历史发展的规律。人类缺乏可持续科学发展观，这种现象就会更频繁。

来源: SV2000 于 2017-02-12 12:00:10 [旧帖] [给我悄悄话] 本文已被阅读：次

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