unmanned
pt, pp of unman.
unmanned adj not manned; operated automatically or without a crew 无人的; 无人操纵的; 自动的
,unmanned `railway signals 自动控制的铁路信号
send an unmanned spacecraft to Mars 把无人驾驶的宇宙飞船发射到火星上去.
🗣️ 情景例句
Sorry, I couldn't help overhearing, did you mention something about...