expendable rocket造句

例句与造句

1. So far this reality has limited spaceflight to multistage expendable rockets or the space shuttle , which is assisted by strap - on fuel tanks and solid - fuel boosters that are jettisoned during ascent
   目前为止，这个事实使太空飞行限于多阶段扩张式火箭或是太空梭；后者在上升过程中抛出附加的燃料箱和固体燃料助力器。
2. It's difficult to find expendable rocket in a sentence. 用expendable rocket造句挺难的