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对于爱德华兹空军基地和美国航天局德莱顿飞行研究中心的飞行试验计划,局外人通常是不允许接触的,不过在最近,空军对外界敞开了大门。
Outsiders are generally denied access to flight test programs at Edwards Air Force Base and NASA’s Drayton Flight Research Center, but recently the Air Force opened the door to the outside world.