retrorockets

retrorockets

美 　英

• n.减速火箭

词形变化

复数：retrorockets  

英汉解释

n.

1. 减速火箭

英英解释

n.	1. a small rocket engine on a spacecraft or missile that produces thrust to act against the main engines, used for decelerating

例句

Each craft had to hit the atmosphere right, deploy its parachute, turn on retrorockets and inflate airbags just before touchdown.

每架探测器必须以正确的角度进入大气，展开降落伞，点燃制动火箭，并在着陆瞬间为安全气囊充气。更详细。