Adjective:

1. lacking a crew;

   "an unmanned satellite to Mars"
   

remote-controlled遥控器

mannedadj.由人操作的；载人的动词man的过去式和过去分词.

1. We sent an unmanned rocket into earth orbit.
   我们把一个无人驾驶的火箭送入了地球的轨道里。
2. Unmanned probes can be much smaller and lighter than manned spaceships.
   无人驾驶探测器可以比载人航天器小得多，轻得多。
3. I am quite unmanned by the news.
   那消息使我茫然若失。
4. Unmanned by grief he broke down and wept.
   他悲伤得不像个男子汉不禁哭了起来。