名词
中文翻译：人口迁移
同义词：
['migration', 'emigration', 'population movement']
例句：
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1. The undermigration of young people is a major concern for the government.
年轻人的外流是政府的一大关注点。
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2. The city has experienced significant undermigration due to economic development.
由于经济发展，该城市经历了显著的人口流失。
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3.The migration patterns of different ethnic groups are influenced by various factors.
不同民族群体的迁移模式受到各种因素的影响。