net migration rate 净迁移率
migration rate 迁移率 ; 运移速率 ; 迁移速率
migration-rate theory 迁移速率理论
interface migration rate 界面迁徙率 ; 分界面徙动率
down stream solute migration rate 下游溶质迁移速率
Total Migration Rate 总迁移率
gross migration rate 总迁移率
all orders migration rate 所有次序的迁移率
CO's migration rate CO迁移速率
As recently as five years ago, US migration was twice the rate of European Union states.
就在5年前，美国的移民率还是欧盟国家的两倍。
During periods when commodity prices were high, the rate of westward migration increased spectacularly.
在商品价格较高的时期，西迁的速度大幅增长。
Between 2000 and 2001, in contrast, the migration rate fell from over 15% to under 14%.
与此形成鲜明对比的是2000年到2001年。人口流动率从15%以上降至不到14%。
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