锅炉内壁要洗刷一下,除去钙质沉淀物。 The boilers will have to be scoured out to remove the calcium deposits.
把咖啡搅一搅好让渣滓沉淀。 Stir the coffee to settle the grounds.
水冶金术通过液体过程,象过滤,提炼,沉淀等方法处理金属,从矿石中或矿石浓缩物中分离出金属 The treatment of metal or the separation of metal from ores and ore concentrates by liquid processes, such as leaching, extraction, and precipitation.
不要喝有沙粒状沉淀物的葡萄酒。 You should not drink the wine with a gritty sediment.