UFO(also ufo), / ˌju: ef ˈəu or, in informal use, 俗读作 ˈju:fəu; ˌju ɛf `o, `juˌfo/ abbr 缩写 = (pl ~s) unidentifiedflying object (esp a flying saucer) 不明飞行物（尤指飞碟）.
牛津英汉双解词典