详细解释:n. 坠落, 沉淀, 降水, 轻率, 急速, 猛冲, 突如其来
【化】 析出
【医】 沉淀[作用]
英语解释：
名词 precipitation:
the quantity of water falling to earth at a specific place within a specified period of timethe process of forming a chemical precipitatethe falling to earth of any form of water (rain or snow or hail or sleet or mist)同义词：downfall