“net migration rate”的概念、定义、翻译、参考文献-科学参考

单词	net migration rate
释义	net migration rate Encyclopedia 法学人口迁移释 net migration rate净迁移率某地区一定时期（通常为一年）内迁入人数和迁出人数之差与平均人口数之比。用千分数表示。
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