UFO
US /ˌjuː.efˈoʊ/
UK /ˌjuː.efˈoʊ/

1.
不明飛行物, 飛碟
an unidentified flying object; a mysterious object seen in the sky for which there is no obvious explanation
:
•
Many people claim to have seen a UFO.
許多人聲稱見過不明飛行物。
•
The pilot reported seeing a strange light, possibly a UFO.
飛行員報告說看到了一個奇怪的光,可能是一個不明飛行物。