Any of various fragile winged insects of the order Ephemeroptera that develop from aquatic nymphs and live in the adult stage no longer than a few days.
英
美
释义
蜉蝣,蜉蝣纲的各种有纤细翅膀的昆虫,由水生的蛹发育而成,成年期仅存活几天。
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