noun🔗Share石蝇， 襀翅目昆虫 Any of the freshwater aquatic insects in the order Plecoptera."The fisherman checked the stream for stonefly nymphs, knowing their presence indicated clean water. "渔夫检查小溪里是否有石蝇的稚虫，因为他知道它们的出现表明水质干净。insectanimalbiologynatureenvironmentChat with AIVocabulary GamePractice Reading
