lift-offs

英 [lɪft ɒfs]

美 [lɪft ɔːfs]

n.  (航天器的)发射，起飞，升空
lift-off的复数

柯林斯词典

• N-VAR （火箭的）发射，发射时刻
  Lift-offis the beginning of a rocket's flight into space, when it leaves the ground.
  1. The lift-off was delayed about seven minutes...
     发射时间推迟了7分钟左右。
  2. The rocket tumbled out of control shortly after lift-off.
     发射后不久，火箭就失控坠落了。