形容词
中文翻译：迁移的
同义词：
['transient', 'nomadic']
例句：
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1. Many migratory birdsmigrate between the Arctic and Antarctic each year.
许多迁徙鸟类每年在北极和南极之间迁徙。
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2. Themigratory bird populationhas decreased significantly in recent years.
近年来，候鸟种群数量显著减少。
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3. The migration patterns of these birdsare fascinating to study.
这些鸟类的迁徙模式令人着迷，值得研究。