盛極必衰，衰極而盛，是曆史發展的規律。人類缺乏可持續科學發展觀，這種現象就會更頻繁。

來源: SV2000 於 2017-02-12 12:00:10 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.