名词
中文翻译：加速器
同义词：
['accelerator', 'propulsion device例句：1. The four accelerators are responsible for controlling the speed of the spacecraft.（这四个加速器负责控制航天器的运行速度。）']
例句：
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1. The four accelerators are responsible for controlling the speed of the spacecraft.
这四个加速器负责控制航天器的运行速度。
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2. The new propulsion device will greatly improve the efficiency of the spacecraft.
新型推进装置将大大提高航天器的效率。
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3. The four accelerators work together to achieve the desired acceleration of the spacecraft.
四个加速器协同工作，实现航天器的预定加速。