富强的民族可能会因为人口出生率的下降而不得不引进外来民族。就看技术能不能进步到不需要父母抚养

来源: dakinglaile 于 2023-04-21 22:27:37 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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