It is in this sense that an astronaut orbiting the earth in a space capsule is said to be "weightless".
就在这种意义上，宇宙飞行员在宇宙密闭小舱里，环绕地球飞行时被说成是“失重”了。
A space navigator wishes to determine his velocity of approach as he nears the moon.
一个宇宙飞行员希望确定出他接近月球时的逼近速度。
An astronaut flies a spacecraft and a pilot flies an aeroplane.
宇航员驾驶宇宙飞船，飞行员驾驶飞机。
Do you know how an astronaut flies in a spacecraft?
你知道宇航员是怎样乘宇宙飞船飞行的吗?
The spaceship flies at light speed.
宇宙飞船以光速飞行。
The spacecraft rounded the moon.
宇宙飞船环绕月球飞行。
SVBT (Space Vehicle Booster Test)
宇宙飞行器助推器试验
lunar orbiter spacecraft
月球轨道宇宙飞行器
The spaceship orbited the moon.
宇宙飞船绕月球运行。
an unmanned spaceflight
无人驾驶的宇宙飞行
the Voyager 2 spacecraft
旅行者2号宇宙飞船.
Estimated Cosmic Radiation Doses for Flight Personnel.
民航飞行人员宇宙辐射受照剂量的估算
A computer aided estimation system for dose of cosmic radiation exposure of aircrew members
飞行人员宇宙辐射受照剂量计算机估算系统
Estimation and Analysise of Cosmic Radiation Effective Dose for Flight Personnel with Different Types of Work
飞行人员宇宙辐射有效剂量的估算和分析
The astronauts pilot their craft down to the lunar surface
宇航员驾驶宇宙飞船在月球表面降落
The astronauts piloted their craft down to the lunar surface.
宇航员驾驶宇宙飞船在月球表面降落.
The science and technology of space flight.
航天学，宇宙航行学研究宇宙飞行的科学及技术
