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单词 alluvial fan
释义 alluvial fann.(名词)alluvial fanAdventdalen ValleySpitsbergen, Norway
  1. A fan-shaped accumulation of alluvium deposited at the mouth of a ravine or at the juncture of a tributary stream with the main stream.冲积扇:指储藏在峡谷山口或在支流与干流交汇处的扇形沉积物
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