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migration

noun
 OPAL W
🔊/maɪˈɡreɪʃn/
🔊/maɪˈɡreɪʃn/
[uncountable, countable]
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  1.  
    the movement every year of large numbers of birds or animals from one place to another迁移；移居；迁徙
    • the seasonal migration of blue whales蓝鲸的季节性迁徙
    • the migration routes of birds鸟类的迁徙路线
    Topics Birdsc1
    Oxford Collocations Dictionaryadjective
    • seasonal
    • autumn
    • fall
    • …
    … of migration
    • wave
    migration + verb
    • occur
    • take place
    • increase
    • …
    migration + noun
    • path
    • pattern
    • route
    • …
    preposition
    • migration from
    • migration to
    See full entry
  2.  
    migration (from…) (to…) the movement of people to a new country or area in order to find work or better living conditions迁移；移居；迁徙
    • migration from rural to urban areas从农村地区到城市的迁移
    • It was one of the largest mass migrations in US history.这是美国历史上最大的大规模移民之一。
    • Net migration— more people moving to the state than leaving—accounts for about two thirds of the population gain.净移民（移居该州的人数多于离开该州的人数）约占总人口的三分之二。
    Extra Examples
    • The decline of the rural economy has caused urban migration.农村经济的衰退已经导致许多人向城市迁移。
    • the forced migration of African slaves非洲奴隶的被迫迁移
    • the great waves of migration that took Europeans to the New World把欧洲人带到新大陆的一波波巨大的移民潮
    Topics Social issuesc1
  3. the act of moving programs, etc. from one computer system to another; the fact of changing from one computer system to another（程序或硬件的）迁移，转移；（计算机系统的）改变