基本解释n.[空]制动发动机同根派生 retroengine相关词英汉例句Retroengine's firing time must the accuracy control, the firing time differ 1 second, will cause the airship point of descent position difference kilometer. 制动发动机的点火时间必须精确控制，点火时间相差1秒钟，就会使飞船落点位置相差数公里。retroengine更多例句