UFOs词根词缀

He said they travel using UFOs that are 38 feet in diameter while 18 of the aliens now work with facilities in the United States.

他还说外星人旅行的时候乘坐的是直径达38英尺（约12米）的UFO，且其中有18个外星人目前在美国从事设备研究工作。

You hear a lot of stories about UFOs-sightings, close encounters, even alien abductions.

你听到过很多关于UFO的故事&影像，近距离接触，甚至外星人绑架。

UFOs, the committee concluded, were not extraterrestrial spaceships, but rather astronomical objects and weather balloons. A second project, Grudge, Published similar findings, but got little public belief.

委员会得出结论，UFO不是外星飞船，而是天文物体和探空气球。第二个项目，Grudge，发布了类似的结果，但是很少有人相信。