seat back cover

例句：

1. 1. The car'sback seat is covered in a soft leathermaterial.
   这辆车的后座被柔软的皮革材料覆盖。
2. 2. The driver needs toadjust the seat back for a better view.
   驾驶员需要调整座椅后部以便有更好的视野。
3. 3. The new model has a more comfortablebackrest than its predecessor.
   新款模型比前款更舒适，有更舒适的背部支撑。