来自拉丁语 sedere,坐下，词源同 sit,seat.-ment,名词后缀。引申比喻义沉积物，沉淀物。

1. The sediment settled and the water was clear.

杂质沉淀后,水变清了.

2. The sediment of coffee will settle.

咖啡渣会沉淀下去.

3. Many organisms that die in the sea are soon buried by sediment.

海洋里死亡的许多生物会很快被沉淀物掩埋。

4. Deposition is the laying down of sediment that has been transported.

沉积是已搬运的物质再沉积下来.

5. They sediment toward the bottom of the centrifuge tube at a velocity.

它们以某一速度向管底方向沉降.