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单词
alluvial fan
释义
WordReference Random House Unabridged Dictionary of American English © 2024
allu
′
vial fan
′
,
[
Physical Geog.
]
Geography, Geology
a fan-shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine or at the foot of a mountain. Also called
allu
′
vial cone
′
.
1870–75
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更新时间:2024/9/20 5:36:47