名词不明飞行物，飞碟

1. ufo：unidentified flying objects; 不明飞行物

2. ufo：unknow fly object; 好像是这个

3. ufo：utility for file operation; 文件操作实用系统

4. ufo：unidentified flying object; 飞碟

1. 不明飞行物
A UFO is an object seen in the sky or landing on earth which cannot be identified and which is often believed to be from another planet. UFO is an abbreviation for (缩略=) 'unidentified flying object'.

e.g. There has been a surge of UFO sightings in America.
美国不明飞行物目击事件激增。