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候鸟
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候鸟
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鸟纲
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migrant birds
候鸟
一年之中随着季节变化,定期地沿着比较稳定的路线,在繁殖区和越冬区之间迁徙的鸟类。又称迁徙鸟。
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information accessibility
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information acquisition of animal and plant
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information analysis and synthesis organization
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