Unmanned vehicles such as spacecraft do not have any people in them and operate automatically or are controlled from a distance.
例句
...a special unmanned spacecraft.一架特别的无人驾驶飞行器...unmanned rockets.自控火箭
ADJ
无人(工作)的
If a place is unmanned, there is nobody working there.
例句
The fare from the last unmanned station is probably less than a pound...从上一个无人站过来的费用可能还不到1镑。Unmanned post offices meant millions of letters went unsorted.邮局无人工作意味着许多信件无人分拣。
英汉词典释义
adj.
(机器, 尤指航天器)无人驾驶的, 无人操纵的
Scientists say these unmanned flights can make important and exciting discoveries.科学家们说这次无人驾驶的太空飞行能够获得令人兴奋的重大发现。