根据《柯林斯英汉双解大词典 》：
N-UNCOUNT Precipitation is rain, snow, or hail. 降水 [技术]
N-UNCOUNT Precipitation is a process in a chemical reaction that causes solid particles to become separated from a liquid. 沉淀; 沉析 [技术][1]
annual precipitation 年降水量；年雨量
acid precipitation n. 酸性降水
electrostatic precipitation 静电沉淀
alcohol precipitation 酒精沉淀法
atmospheric precipitation 大气降水，大气沉降；降水
precipitation reaction 沉淀反应
precipitation intensity 降水强度；降雨强度
precipitation enhancement 人工增雨；降水增加
precipitation tank 沉淀槽；沉降罐
precipitation hardening 析出硬化；淀积硬化
amount of precipitation 降水量，降雨量
dust precipitation 除尘；煤尘沉降
precipitation kinetics n. 沉淀动力学
fractional precipitation [化]分段沉淀；分步沉淀[1]
Lead lined gutters and downspouts are used to deal with precipitation.
铅衬水槽和落水管用于处理沉淀。
But with no signs of any precipitation, the prospect of the harvest looks bleak.