an aircraft without a pilot, controlled from the ground or by a computer on board (the abbreviation for ‘unmanned aerial vehicle’) synonym drone (3)无人机:无飞行员的飞机,是从地面或通过机载计算机(“无人机”的缩写)控制的,它是无人机的代名词(3) The UAVs could be used for surveillance of possible enemy activity. 无人机可以用来监视可能的敌人活动。