rear expansion sheet

例句：

1. 1. The rear expansion sheet is used to expand the space behind the car.
   后部扩展表用于汽车后方空间的扩展。
2. 2. The rear expansion sheet helps to improve fuel efficiency.
   后部扩展表有助于提高燃油效率。
3. 3. The rear expansion sheet can be used to store spare parts for the car.
   后部扩展表可以用来存放汽车的备件。