无人机的英文：
UAV (unmanned aerial vehicle)
A Study of the Synchronism of Double Solid Boosting Rockets Applied to UAV
无人机双发固体火箭助推器同步性研究
adj. 无人的；无人操纵的
Wouldn't it be better to concentrate on unmanned flights?
把精力集中于无人飞行是否更好？
Data from the NASA skylab project and several unmanned satellites are thoroughly analyzed
来自美国宇航局的天空实验室和几个不载人的卫星的数据得到彻底研究。
The world's largest unmanned plane has been unveiled in Australia.
世界上最大的无人驾驶飞机首度在澳洲亮相。
n. 天线
adj. 空中的，航空的；空气的；空想的
A telescopic aerial,stand,umbrella
伸缩式天线、伸缩式支架、折叠伞.
The birds perched upon the television aerial.
那些鸟栖在电视天线上。
Aerial pollution is a problem that should be solved quickly.
空气污染是一个亟待解决的问题。