短語詞組短語backwater function 壅水函數(shù)backwater surface 回水面backwater area 回水區(qū);回水面積backwater trip 搭乘椰林游河Backwater Gulch 死水峽谷;后水峽谷Backwater Blues 悲傷逆流而上backwater tour 回水泛舟 返回 backwater