名词
中文翻译：迁移
同义词：
['emigration', 'emigrate', 'relocate', 'resettle']
例句：
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1. The migrationof birds is a natural process.
鸟类的迁徙是一种自然过程。
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2. Many people migrate to warmer climates during the winter.
许多人在冬天迁移到较温暖的气候地区。
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3.The government has been trying to prevent illegal migration.
政府一直在试图阻止非法移民。