segmented solid rocket motor造句

例句与造句

1. china already has such segmented solid rocket motor and ramjet capabilities today, but scramjets are a much greater challenge
   中国已经拥有这种分离式火箭助推器和冲压发动机技术，但超音速燃烧冲压发动机是一个更大的挑战。
2. It's difficult to find segmented solid rocket motor in a sentence. 用segmented solid rocket motor造句挺难的