seat cushion board

例句：

1. 1.The office chair has a comfortable cushion boardthat provides excellent support.
   这款办公椅有一个舒适的坐垫，提供了极好的支撑。
2. 2. The newcar comes with a high-quality cushionboard for the back seats.
   新车配备了高质量的后座垫。
3. 3. The cushion board is designed toabsorb shock and provide comfort during long flights.
   这个垫子设计用来吸收冲击并提供长途飞行时的舒适感。