unloaded sag

例句：

1. 1.The truck was unloaded at the warehouse.
   卡车在仓库卸载。
2. 2. The heavy load caused the car to sag.
   沉重的负载使汽车下垂。
3. 3. The cargo had been unloaded from the ship.
   货物已从船上卸载。