单词：stoneflies
(stonefly 的第三人称 -s形式) 石蝇
-s form of stonefly
n. primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones
n. primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones