柯林斯词典billabong /ˈbɪləˌbɒŋ/ 1. N a backwater channel that forms a lagoon or pool 死水洼地 返回 billabong剑桥词典In Australia , a low area of ground that was part of a river in the past and that only fills up with water from the river during a flood . （旧时只有雨季才有水的）干涸河床 返回 billabong