unmanned

an unmanned spaceflight

驾驶宇宙飞行

an unmanned spacecraft.

驾驶宇宙飞船

an unmanned level crossing.

管理道口。

the need for unmanned and expendable launch vehicles.

对不回收驾驶运载火箭需要。

Scientists say these unmanned flights can make important and exciting discoveries.

们说这次驾驶太空飞行能够获得令兴奋重大发现。

A Royal Marine poses for photographers with the Unmanned Vehicle Robot, Testudo, at the launch of the Defence Technology Plan in London February 26, 2009.

皇海军陆战队构成摄影师与机机器，陆，在推出国防技计划在伦敦2009年2月26日。