短语词组短語backwater function 壅水函數backwater surface 廻水麪backwater area 廻水區;廻水麪積backwater trip 搭乘椰林遊河Backwater Gulch 死水峽穀;後水峽穀Backwater Blues 悲傷逆流而上backwater tour 廻水泛舟 返回 backwater