retro-rocket造句

例句与造句

1. Finally, when in orbit round the earth, the calculators calculate exactly when to fire the retro-rocket to effect re-entry .
   最后，在围绕地球的轨道运行的时候，计算机会精确地计算出应该在什么时候发射制动火箭以重返大气层。
2. It's difficult to find retro-rocket in a sentence. 用retro-rocket造句挺难的