sediment

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.

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.

侍酒师小心地澄清这瓶陈年老酒，让瓶底的沉淀物保持不动。

The sommelier carefully decanted the old wine, leaving the ___sediment undisturbed at the bottom of the bottle.