packing sedimentation by throwing stones

例句：

1. 1.They packed all their belongings into the trunk of the car.
   他们把所有的东西都装进了汽车的后备箱。
2. 2. The package arrived safely at the post office.
   包裹安全到达邮局。
3. 3. He packed his bags and left for the airport early in the morning.
   他收拾好行李，一大早就出发去机场了。