Launching space vehicles from its top would be much cheaper.

而从天梯顶部发射太空飞行器造价会更为低廉。

Then they see space vehicles and a rock collected from the moon.

然后，他们观看太空交通工具以及从月球上收集的岩石。

A module is part of a space vehicle that can work independently.

该太空舱可以独立运作属于飞船的一部分。

This marks the first time that commercially developed space vehicles have carried humans into orbit.

这标志着商业开发的太空飞行器首次将人类送往太空轨道。

The mission was to land a space vehicle, called a rover, on the moon's surface.

这次任务是让一辆名为月球车的太空飞行器在月球表面着陆。

A Russian teacher of that time, Konstantin Tsiolkovsky, decided that a rocket engine could provide power for a space vehicle.

当时，俄罗斯一位老师——康斯坦丁·齐奥尔科夫斯基认为，火箭发动机可以为太空飞行器提供动力。

Such engines are used for long-distance missiles and space vehicles.

这种发动机用于远程导弹和太空飞行器。

It's the most versatile space vehicle that has ever been built.

它是有史以来最通用的太空飞行器。

While making significant contributions to space science, CubeSats may pose hazards to other space vehicles.

8. 在对空间科学做出重大贡献的同时，立方体卫星可能对其他空间飞行器造成危害。

A) Recycle used space vehicles before they turn into debris.

A) 在用过的航天器变成碎片之前对其进行回收。