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外星人多次造访地球,并非来无踪去无影,他(她)们的飞行器甚至躯体都已留在地球上。美国隐藏的外星人踪迹公诸于世的已有多起。
Many alien visit to the Earth, not without a trace to no shadow, he (her) aircraft and even body have been left on Earth. How many hidden alien tracks in the United States have been made public?