The life cycle of mayflies consists of four stages: egg, nymph, subimago, and imago.蜉蝣的生命周期由四个阶段组成: 卵, 蛹,亚成虫, 成虫....

mayflies的音标：...

n.蜉蝣类，飞蝼蛄( mayfly的名词复数 )...