被称为不明飞行物的英文缩写是?
UFO
ufo
UFO
Unidentified Flying Oject(another nickname is flying
saucer) The UFO researcher J. Allen Hynek described a UFO as "the reported perception of an object or light seen in the sky or upon the land the appearance, trajectory, and general dynamic and luminescent behaviour of which do not suggest a logical, conventional explanation and which is not only mystifying to the original percipients but remains unidentified after close scrutiny of all available evidence by persons who are technically capable of making a common sense identification, if one is possible."
This is reputedly a UFO over Passoria, New Jersey, 1952. It comes from an FBI document but there is no information establishing authenticity, or otherwise.Many people believe that UFOs are extraterrestrial spacecraft, but others say there is no compelling evidence to support such a conclusion. Most scientists and academics adhere to a standard of research attributed to Carl Sagan that "extraordinary claims require extraordinary evidence". As a result, critiques are often made against those who believe that UFOs are extraterrestrial spacecraft.
参考资料：http://en.wikipedia.org/wiki/UFO
