柯林斯詞典billabong /?b?l??b??/ 1. N a backwater channel that forms a lagoon or pool 死水窪地 返回 billabong劍橋詞典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 . （舊時(shí)衹有雨季才有水的）乾涸河牀 返回 billabong