noun 다운로드 🔗공유 비행운 An artificial cloud made by the exhaust of jet aircraft or wingtip vortices that precipitate a stream of tiny ice crystals in moist, frigid upper air. Examples : "The airplane's contrail stretched across the sky, a thin white line marking its path. " 비행기의 비행운이 하늘을 가로질러 뻗어 있었고, 얇은 흰색 선이 그 경로를 표시했다. weather environment science physics technical AI와 채팅어휘 게임독해 연습
