无人飞船的英文：
unmanned spacecraft

unmanned是什么意思：
adj. 无人的；无人操纵的

Wouldn't it be better to concentrate on unmanned flights?
把精力集中于无人飞行是否更好？

Data from the NASA skylab project and several unmanned satellites are thoroughly analyzed
来自美国宇航局的天空实验室和几个不载人的卫星的数据得到彻底研究。

The world's largest unmanned plane has been unveiled in Australia.
世界上最大的无人驾驶飞机首度在澳洲亮相。

The much-Publicized Siegfried Line was virtually unmanned and without guns
当初大肆吹嘘的齐格菲防线，实际上已无人也无炮防守。

Japan has set next month for the debut launch of a new unmanned resupply spacecraft for the international space station.
日本将于下月首次向国际空间站发射新的无人驾驶补给飞船。

spacecraft是什么意思：
n. 宇宙飞船

This is the pod of the spacecraft.
这是飞行器的分离舱。

The spacecraft has arrived on Mars.
宇宙飞船已经到达了火星。

SOCE (Spacecraft Operations and Checkout Facility)
宇宙飞船操作的检验装置

The spacecraft orbited Mars three times.
太空船绕火星四周的轨道转三周。

At, in, toward, or close to the stern of a vessel or the rear of an aircraft or a spacecraft.
向船部地（的）在、朝、向着或接近船只的尾部或者飞机、飞船的后部