名词
中文翻译：洪水平原沉积物
同义词：
['alluvial deposit', 'fluvial sediment', 'fluvial deposit', 'fluvial sediment']
例句：
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1. Theflood plain deposit is a valuable resource for archaeologists to study the history of the region.
洪水平原沉积物是考古学家研究该地区历史的重要资源。
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2.The alluvial deposits in the riverbed are rich in minerals and can be used as building materials.
河床的冲积沉积物富含矿物质，可以作为建筑材料使用。
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3.The fluvial sediment has been found to contain traces of ancient civilizations that lived in this area.
冲积沉积物被发现含有古代文明的痕迹，这些文明曾生活在该地区。