retrorocket

英汉释义

• n.

  1.减速火箭

英英释义

• n.

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

英汉例句

• 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。