migration [maɪˈgreɪʃn]
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基本释义
n.迁移,移居,(鸟类等的)迁徙
英英释义
the movement of persons from one country or locality to another
参考例句
Swallows begin their migration south in autumn. 燕子在秋季开始向南方迁移。
He described the vernal migration of birds in detail. 他详细地描述了鸟的春季移居。
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