noun 下载 🔗分享 蜉蝣,蚍蜉 Any of the many fragile insects of the order Ephemeroptera that develop in fresh water and live very briefly as winged adults. Examples : "Along the riverbank, we saw hundreds of mayflies swarming, their brief adult lives already nearing their end. " 在河岸边,我们看到成百上千的蜉蝣在群舞,它们短暂的成虫生命已经接近尾声。 insect animal biology nature ecology 与AI对话词汇游戏阅读练习