drainage basin編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看drainage basindrainage basin — 名詞名詞1. an area of land where all water drains into a common outlet1.名詞釋義流域an area of land where all water drains into a common outlet例句The Amazon River has the largest drainage basin in the world.