loose sediment layer 松散沉积层
Quaternary loose sediment 第四系松散沉积物
loose soft sediment 松散地层
Loose sandy sediment 松散沙质沉积物
By reviewing the sedimentary history of loose sediment in the west part of Huibei plain, we build the hydrogeology structure of the loose sediment for the first time.
通过重塑淮北平原西部松散层的沉积历史，首次对其水文地质结构进行了系统划分。
Thus a proportion of the total volume of any sediment, loose or cemented, consists of empty space.
因此，无论是疏松或胶结，沉积物总体积都有一部分是由空隙组成的。
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