a jet engine containing its own propellant and driven by reaction propulsion
例句
用作名词 (n.)
Another unconventional design element, the hybrid rocket engine that powers the suborbital vehicle, provides unique operational options. 另一个异于传统的设计要素，是提供次轨道载具动力的混合式火箭引擎，它能提供独特的操作选择。
For one thing, they simplify the design of a rocket engine. 首先，它们可以简化火箭发动机的设计。
Rocket motors have many advantages over other forms of propulsion. 火箭发动机比其他推进器有许多优点。
美
