The first represents the drainage in the soil, the second represents the overland flow on saturated or impervious soils and the third represents the channel flow.是什么意思_The first represents the drainage in the soil, the second represents the overland flow on saturated or impervious soils and the third represents the channel flow.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句