例句與造句

1. Each craft had to hit the atmosphere right , deploy its parachute , turn on retrorockets and inflate airbags just before touchdown
   每架探測器必須以正確的角度進入大氣，展開降落傘，點燃制動火箭，并在著陸瞬間為安全氣囊充氣。
2. It's difficult to find retrorocket in a sentence. 用retrorocket造句挺難的