noun🔗Share蜉蝣，蜉蝣目昆虫 Any of the many fragile insects of the order Ephemeroptera that develop in fresh water and live very briefly as winged adults."Example Sentence: "Near the river, swarms of mayflies appeared and died within a few hours, their brief adult lives already over." "在河边，成群的蜉蝣出现，仅仅几个小时就死去，它们短暂的成虫生命已经结束。insectanimalnaturebiologyecologyChat with AIVocabulary GamePractice Reading
