sediment|sediments

杯底的沉淀物说明这杯果汁已经放了很久。

The ___sediment at the bottom of the glass shows this juice has been sitting for a long time.

他的眼神中透露出岁月的沉淀。

His eyes reveal the ___sediments of years.

河底的沉积物包含了不同年代的矿物质。

The riverbed ___sediment contains minerals from different time periods.