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。

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The company claims it has used experience gained in fields such as rocket engine manufacturing, nanotechnology and particle physics to have created the new blade.

该公司声称其使用了火箭引擎生产、纳米技术与粒子物理学等领域的经验技术，使这款新的刀片得以问世。

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Some satellites come equipped with a rocket engine and propellant tank so controllers can aim their descent into an ocean instead of a neighborhood, but not all.

而有些卫星则装配了火箭发动机和推进剂贮箱，这样可以控制它们的坠落路线，将其引导坠落到海洋之中，而不是坠落到居民区里。

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They had to do this by firing the lunar module rocket engine for just the right amount of time.

VOA: special.2009.07.22

There were new designs for the plane's rocket engine, landing equipment and the small rockets needed to move it in space.

VOA: special.2010.07.07

After a few seconds, when the X-15 was safely away, the pilot started its rocket engine.

VOA: special.2010.07.07

The key is a unique motor, the Sabre, which serves as jet engine and rocket rolled into one.

BBC: Skylon: A British dream of space

The rocket engine power plant runs at a 35% thermal efficiency, versus 55% for conventional gas-fired plants.

FORBES

The oxygen that remains is burned with fuel and water in a chamber modeled after a rocket engine.

FORBES