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  3. Doves flying in daylight use the sun for guidance. But the stars are obviously their most important means of navigation. They fi

Doves flying in daylight use the sun for guidance. But the stars are obviously their most important means of navigation. They fi

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问题 Doves flying in daylight use the sun for guidance. But the stars are obviously their most important means of navigation. They find their way by such landmarks as mountains ranges, coastlines, and river courses. When it is too dark to see these, the doves
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答案鸽子白天飞行是把太阳用作向导，但显然星星是它们最重要的飞行向导。它们通过山脉、海岸线和河道来识别道路。当太黑看不见这些东西，它们就无助地转圈子，无法识别它们的方位。
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