人口是康乾盛世的130年恢複和增長的。一是恢複，二是玉米地瓜土豆的引進使世界養活人口從4億增長到40億

來源: 老生常談12 於 2025-01-05 06:58:41 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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