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alluvion的英文翻譯是什么意思，詞典釋義與在線翻譯：
英英釋義
Noun:
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gradual formation of new land, by recession of the sea or deposit of sediment
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the rising of a body of water and its overflowing onto normally dry land;
"plains fertilized by annual inundations"
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clay or silt or gravel carried by rushing streams and deposited where the stream slows down
