ADJ Alluvial soils are soils which consist of earth and sand left behind on land which has been flooded or where a river once flowed. 冲积的 [技术]
As a result of fluvial scouring and aggrading the riverbed, the alluvial layer is fluid-saturated porous medium.
由于河流冲刷和河床加积，沉积层多饱和多孔。
There into the sea on the continental shelf of alluvial river delta formation.
在大陆架上有流入大海的江河冲积形成的三角洲。
The water cuts the alluvial banks of the " lower " river into deep horseshoe curves.
河水把下游那些冲积的河岸冲成很深的马蹄形曲线。
"Because most of the gold deposits found in Sierra Leone, which had been worked on, were from the alluvial deposits.
VOA: standard.2010.04.22
He is one of many who have flocked to the Kangari hills in southern Sierra Leone to find small fortunes in the hard graft of alluvial gold mining.
VOA: standard.2010.04.22
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