那时气候暖和。N系和O系同源，起源缅甸，分离出来更早北上，和C 系一起种黍稷，就是黄米和小米，产量低人口少。

来源: rulvbobing 于 2025-09-26 16:05:31 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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