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经济性移民
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经济性移民
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economic migration
经济性移民
人类以改善个体、家庭、族群的生产生活环境、社会经济条件及提高经济收入、生活质量为主要目的进行的,人口在不同城市、地区、国家间的流动和迁移;广义也包括投资、教育、商业、劳动、就业、婚姻等不同原因驱动的人口迁移活动。
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unconventional oil
unconventional oil and gas
unconventional oil and gas resource evaluation
unconventional pairing
unconventional reservoir seepage
unconventional superconductivity
unconventional superconductor
unconventional two-dimensional electron gas
unconventional water resources
UN Convention on Jurisdictional Immunities of States and Their Property
uncooled
uncooled infrared sensor
UNCOPUOS
uncorrelated
uncorrelated functions
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uncorrelation
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