precipitationn.仓促；急躁；沉淀；降雨量；坠落；凝结；冰雹precipitation deficit降水量不足precipitation station雨量站precipitation fallout降水沉降物precipitation schemes降水方案precipitationrecharge降水补给precipitation sampler降水取样器precipitation nowcast降水临近预报precipitation scatter降水散射precipitation antigen沉淀抗原precipitation barrier沉淀障