alluvial

adj.冲积的；淤积的

n.冲积土；淤积土

Some alluvial deposits are a rich source of diamonds. 一些冲积物是钻石的丰富来源。

Bangkok is surrounded by a vast, damp, alluvial plain, crisscrossed by a network of klong. 曼谷为一个广阔潮湿的冲积平原所环绕，有纵横交错的运河网。

Alluvial soils usually grow the best crops. 淤积土壤通常能长出最好的庄稼。

The farmers found the alluvial deposits at the mouth of the river very fertile. 农民发现这条河口底下的沉积物很肥沃。