noun 다운로드 🔗공유 비행운 A contrail; a visible line of condensation flowing from the edge of an airplane wing or similar structure. Examples : "We looked up at the sky and saw long, white condensation trails behind the jet planes. " 우리는 하늘을 올려다보며 제트기 뒤에 길고 흰 비행운을 보았다. weather physics environment technology space phenomena AI와 채팅어휘 게임독해 연습