1.
astrometric position
天体或宇宙飞行器在天球上位置(经过光行差改正
2.
Something that orbits, especially a spacecraft that orbits a planet or moon without landing on it.
轨道飞行器循轨道飞行的物体，尤指循一行星或月球运行而不在其上着陆的宇宙飞船
3.
a landing of a spacecraft in the sea at the end of a space flight.
航天飞行结束时宇宙飞船在海上着陆的行为。
4.
To navigate a spacecraft, as in celestial flight.
导航为宇宙飞船导航，如在航天飞行中
5.
a method of controlling the flight of a missile or spacecraft by reference to the positions of celestial bodies.
根据天体位置引导导弹或者飞行器飞行的方法。
6.
lunar orbiter spacecraft
月球轨道宇宙飞行器
7.
A space vehicle carries people into space.
宇宙飞船载人上天。
8.
The spaceship blasted off.
宇宙飞船发射上天了。
9.
A person trained to pilot, navigate, or otherwise participate in the flight of a spacecraft.
宇航员在宇宙飞船的飞行中训练来导航，驾驶航天飞机，或参与其它活动的人员
10.
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
11.
The spacecraft rounded the moon.
宇宙飞船环绕月球飞行。
12.
Because the spacecraft is still under the influence of the eart's gravity, it begins to decelerate as it travels toward the moon.
由于宇宙飞行器仍在地球引力的影响下，它飞向月球时开始减速。
13.
space probe(unmanned spacecraft which obtains information about space and transmits it back to earth)
航天探测器（一种不载人的宇宙飞船,用以搜集有关宇宙的资料,并发送回地球）
14.
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。
15.
The spacecraft is in orbit (ie moving in orbit) round the moon.
该航天器在绕月球轨道上飞行.
16.
An apparatus in which human beings or animals are enclosed and which is revolved to simulate the effects of acceleration in a spacecraft.
航天试验离心机人和动物在其里面并旋转以模仿宇宙飞行器的加速作用的一种仪器
17.
SVBT (Space Vehicle Booster Test)
宇宙飞行器助推器试验
18.
The spaceship orbited the moon.
宇宙飞船绕月球运行。