noun🔗Share冲积平原，洪泛区. An alluvial plain that may or may not experience occasional or periodic flooding."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。geographyenvironmentgeologydisasterareaChat with AIVocabulary GamePractice Reading
