busy-back jack

例句：

1. 1. The bus driver was so busy that he couldn't stop to pick up the fallen passenger.
   公交车司机太忙了，以至于没有停下来去接那个摔倒的乘客。
2. 2. The busy back jacker had to work overtime to meet the deadline.
   忙碌的背夹式千斤顶不得不加班以满足截止日期。
3. 3. The busy back jacker managed to fix the car in no time.
   忙碌的背夹式千斤顶很快就修好了汽车。