全部

1·What is a space vehicle launching entity required to do according to the current Government Orbital Debris Mitigation Standard Practices?

根据现行的政府轨道碎片缓减标准做法，航天器发射实体需要做什么？

2·When was the first space vehicle sent up?

第一颗宇宙飞船是什么时刻发射的？

3·NASA has cancelled its plans for a post-shuttle space vehicle. Until U.

美国航空航天局已经取消了建造后航天飞机时代太空飞行器的计划。

4·Up to now, it is only the rocket which can propel a space vehicle.

迄今为止，只有火箭才能推进宇宙飞行器。

5·It provides a new way for space vehicle detection and positioning.

为空间飞行器的探测提供了一种新型的手段。

6·Responding to the body, greatly increases the optimized design of space vehicle maintenance.

车身的优化设计，大大增加了整车的维修空间。

7·The big effect of space environment upon launch and operation of space vehicle are discussed.

空间环境条件对地面航天器发射和空间航天器系统运行有很大影响。

8·It was launched in nineteen seventy-one. Mariner nine was the first space vehicle to orbit another planet.

该火星探测器于1971年发射升空，水手九号火星探测器沿火星轨道运行是太空飞行器第一次沿着别的行星轨道运行。

9·It provides an available evaluation method for safety measurement at the space vehicle launching site.

该理论模型可为航天发射场制定安全防护措施提供有用的评估方法。

10·The space environment factors, which are necessary for the design, test and operation of space vehicle, are developed.

提出了在航天器设计、飞行试验与运行过程中，必须考虑可能带来影响的空间环境条件因素。