沉淀chéndiàn 1.溶液中难溶解的物质沉到溶液底层。{precipitate; sediment; (of insoluble substances in solution) form a sediment at the bottom of a solution} 2.沉到溶液底层的难溶解的物质。{sediment; insoluble substances at the bottom of solutions} 3.〈比喻fig.〉凝聚,积累{accumulate; accrete}: 情感需要～,才能写出好诗{Accumulation of emotions is the premise of creating a good poem.}|过多的资金～对于流通是不利的。{Excessive accretion of funds is harmful to the circulation of money.}