单词：marine alluvium
marine alluvium的用法和样例：
例句
- This saphire deposit is occurred in the Holocene alluvium.矿床赋存于全新统冲积层。
- Much of the higher reflecting alluvium and limestone fell along the toe portion of the characteristic curve.大部分反射率较高的冲积层和灰岩都位于特性曲线的趾部。
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