extraterrestrial being 外星人 ; 外星生物
UFO enthusiasts claim the video shows that the space shuttle was being followed by extraterrestrial spacecraft, which then fled in response to a ground-based laser attack.
UFO爱好者们宣称这段视频展现了航天飞机被外星人飞行器跟踪，随后在地面激光攻击下逃离的情形。
He was the first human being to set foot on an extraterrestrial world.
他是第一个人上设置一个外星世界英尺。
Have an extraterrestrial being really in the world?
世界上真的有外星人么？
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