草原不适合生产谷物，你没注意草原上不长树的。畜牧业支持不了高人口密度。乌克兰也太冷。

来源: 十具于 2026-02-21 13:41:38 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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