noun🔗Share轻型观察直升机 Acronym of light observation helicopter."During the Vietnam War, the military used loaches for scouting and reconnaissance missions because they were small and agile. "在越南战争期间，军方使用轻型观察直升机进行侦察和侦查任务，因为它们体积小且灵活。militaryvehicleChat with AIVocabulary GamePractice Reading
noun🔗Share泥鳅，鳅鱼。 A bottom-feeding freshwater fish in the superfamily or suborder Cobitoidea."The pet store had a tank full of loaches cleaning up the algae and leftover food at the bottom. "宠物店里有一个鱼缸，里面养满了泥鳅，它们清理鱼缸底部的藻类和残余食物。fishanimalChat with AIVocabulary GamePractice Reading
