未来城市空中交通——NASA Embraces Urban Air Mobility, Calls for Market StudyUAM Challenges Require CollaborationStudy will Define UAM Market
未来城市空中交通NASA Embraces Urban Air Mobility, Calls for Market Studyhttps://www.nasa.gov/aero/nasa-embraces-urban-air-mobility/简单粗暴的定义：Urban air mobility means a safe and efficient system for vehicles...
