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1·The liquids employed for rocket propulsion are called propergols.

多级火箭是装有一台以上发动机的火箭。

2·It is laid in the sea bottom and will rise to surface with its rocket propulsion.

它被储存在海底和将使用它的火箭发动机快速上浮到水面。

3·Gel propellant is a new kind of propellant for rocket propulsion and other gas generator.

胶体推进剂是火箭推进和其它燃气发生器的新型待选推进剂。

4·The accelerating development of the space technology and the rocket weapon technology calls for increasingly high reliability of the rocket propulsion system.

随着航天与火箭武器技术的迅猛发展，对推进系统的可靠性要求越来越高。

5·This paper attempts to analyse the tendency to develop liquid propellant rocket propulsion technology according to the requirements o launch vehicles and spacecrafts.

本文试图根据运载火箭和航天器的需要来分析液体火箭推进技术的发展趋势。

6·To overcome the difficulties on acquiring enough fault modes from ground and flight test data, the failure process for liquid propellant rocket propulsion systems was modeled.

为克服由于试验或飞行数据不足而无法获取系统足够故障模式的问题，开展了液体火箭推进系统故障过程建模与计算机仿真研究工作。

7·Propulsion is provided by a rocket engine, rather than a propeller and rudder, which makes steering difficult.

推进器是由火箭发动机提供的，而不是螺旋桨和方向舵，这使得转向变得困难。

8·One might think that fusion propulsion requires some exotic fuel to propel a rocket a million-or-so-times more energetically than standard chemical fuels.

有人可能会认为聚变推进需要一些能量高于标准的化学燃料一百多万倍的稀有燃料推进一个火箭。

9·What You'll Learn: What will make up the future of rocket-propulsion systems!

你将学习：火箭推进系统的未来走向。

10·As part of this exploration plan, 2015 is now the deadline for finalizing a heavy-lift rocket design, and there will be renewed focus on advanced propulsion systems and other technologies.

探索计划要求重载火箭的研制需要在2015年之前完成，到时还将会重新集中研发推进系统及其他科技项目。