名词
中文翻译：冲积层形成
同义词：
['alluvial deposit', 'alluvial fan', 'alluvial plain', 'alluvial valley']
例句：
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1.The alluvial formations in the region are rich in minerals and can be used for industrial purposes.
该地区的冲积层富含矿物，可用于工业用途。
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2.The alluvial formations are a testament to the geological processes that have shaped the landscape over time.
冲积层是地质过程塑造景观的历史见证。
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3.The alluvial formations are also important for agriculture, as they provide fertile soil for crops.
冲积层对农业也很重要，因为它们为农作物提供了肥沃的土壤。