短語詞組短語antecedent rainfall and process precipitation 前期降水與始發(fā)日降水threshold values of rainfall precipitation 降雨閾值annual rainfall distribution and precipitation 降水年型rainfall intensity during once precipitation 次降雨雨強precipitation rainfall level 雨量水位precipitation rainfall sensor 雨量傳感器auto recording precipitation rainfall meter 自記雨量儀 返回 rainfall precipitation