什麽情況下每一代就人口減半？你舉一個和平時期一代下來人口減半的例子？不要減半，減20%。

來源: 衡山老道於 2025-01-04 12:13:38 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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