助推发动机（booster engine），是指为改善飞行器性能，或为适应高原、炎热地区起飞等要求而安装的一种短时间工作的小型发动机。
经射击试验证明文中所述对增程弹火箭助推发动机喷管设计具有一定的指导意义。
The design of the nozzle of the rocket assisted engine with the base bleed compound extended range shrapnel is introduced in this paper.
经射击试验证明文中所述对增程弹火箭助推发动机喷管设计具有一定的指导意义。
It's indicated that the design of the nozzle of the rocket assisted engine is to direction advantage in engineering by the experiment.
在激增的科学院所、技术中心、企业孵化器、创业基金的助推下，美国大学更是经济的发动机，而不是象牙塔。
America's universities are economic engines rather than ivory towers, with proliferating science parks, technology offices, business incubators and venture funds.
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