短語詞組短語ancient annual surface runoff 古年地表徑流量mean annual average runoff 多年平均徑流量annual natural runoff 天然徑流量annual average runoff model 流域年均徑流模型annual mean runoff coefficient 多年平均徑流系數(shù)annual average runoff volume 多年平均徑流量average annual surface runoff 年均徑流量annual average runoff 年平均流量annual design runoff 設(shè)計(jì)年徑流 返回 annual runoff