unidentified flying object

常见例句

In popular culture, the term UFO–or unidentified flying object–refers to a suspected alien spacecraft, although its definition encompasses any unexplained aerial phenomena.
通俗地说，所谓 UFO——或者不明飞行物——指疑似外星人的飞船，不过它的定义也包括无法解释的空中现象。
Beware the little green men – the number of 'unidentified flying object'(UFO) sightings has more than tripled this year, Ministry of Defence documents reveal. Daily Telegraph.
小心那绿色小人– 国防部文件显示，今年目睹“不明飞行物体”（UFO）的数字是去年的三倍多。英国《每日电讯报》。
UFO stands for unidentified flying object.
UFO的意思是不明飞行物。