vomit comet

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  N an aircraft that dives suddenly in altitude, simulating freefall, in order to allow astronauts to experience the nausea that can affect people in a gravity-free environment 呕吐彗星; 一种从高处突然俯冲而下模仿自由落体的飞机，宇航员会感觉到人在零重力环境中所有的恶心感 [非正式]