noun 下载 🔗分享 冲积平原,洪泛区. An alluvial plain that may or may not experience occasional or periodic flooding. Examples : "The new park was built on the floodplain, so sometimes it gets muddy after heavy rain. " 新建的公园建在冲积平原上,也就是洪泛区,所以有时大雨过后会变得泥泞。 geography environment geology disaster area 与AI对话词汇游戏阅读练习