名词
中文翻译：无动力飞行
同义词：
['unmanned flight', 'unmanned aircraft', 'unmanned vehicle']
例句：
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1. Theunmanned spacecraft landed safely in the remote area.
无人航天器安全着陆在偏远地区。
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2. Unmanned vehicles are increasingly used for transportation in urban areas.
城市地区越来越多地使用无人车辆进行运输。
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3.The unmanned aircraft was used to survey the new construction site.
无人飞机被用来勘察新的建筑工地。