N any carnivorous aquatic beetle of the family Dytiscidae, having large flattened back legs used for swimming 龙虱
ADJ of, relating to, or belonging to the Dytiscidae 龙虱科的
N（名词） any carnivorous aquatic beetle of the family Dytiscidae, having large flattened back legs used for swimming 龙虱
ADJ（形容词） of, relating to, or belonging to the Dytiscidae 龙虱科的