unmanned
[ʌnˈmænd]
adj.
被阉割的;
（机器，尤指航天器）无人驾驶的;
怯懦的;
（鹰等）未受狩猎训练的;
v.
使失去男子气质( unman的过去式和过去分词 );
阉割;
使怯懦;
使气馁;
例句:
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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。
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Mariner programme Unmanned probes explore the inner Solar System.
来自BBC
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an unmanned Mars mission
无人火星探测
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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.
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Unmanned ships have a great potential to HIT THINGS!
来自SA
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Unmanned aircraft, or drones, are partly responsible.
来自VOA