A conception of adjustable solid propellant rocket motor was proposed.

本文提出了一种推力可调的固体火箭发动机的设想方案。

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On the assumption of "Y", a three-dimensional model is obtained for the linear acoustic combustion in a rocket motor.

通过提出一个“Y假设”，本文求得了一个固体火箭发动机线性声振荡燃烧的三维理论模型。

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NASA's Space Shuttle Program conducted the final test firing of a reusable solid rocket motor Feb. 25 in Promontory, Utah.

2月25日，美国航天局航天飞机组在犹他州海角对可回收的液态火箭引擎进行了最后的测试。

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Space debris made news on March twelfth when a part of an old rocket motor about ten centimeters in size threatened the International Space Station.

VOA: special.2009.04.01

SpaceShip Two will use its hybrid rocket motor to propel itself into space.

FORBES: Out Of This World: Space, The Final Frontier

The term hybrid is used because this type of rocket motor uses neither all-liquid fuel nor all-solid fuel, but a combination of both.

BBC: Hybrid success for British rocket

Dr Baker reckons that costs can be cut if the launch rocket uses the satellite's guidance computer instead of having its own, and if the satellite's built-in rocket motor is bolstered to do the work now performed by a launch rocket's upper stage.

ECONOMIST: Space