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unmanned aircraft
space	无人驾驶飞机; 无人驾驶飞机; 无人机
English thesaurus
Unmanned Aircraft
abbr.	UA (Alex Lilo)
unmanned aircraft
avia., Canada	A power-driven aircraft, other than a model aircraft, that is designed to fly without a human operator on board. aircraft UA, and unmanned aircraft system (UAS)
USA	An aircraft that does not carry a human operator and is capable of flight with or without human remote control (JP 3-30)

Unmanned Aircraft: 14 phrases in 3 subjects

Air defense	1
Aviation	7
Space	6