sponge seat cushion

例句：

1. 1.The sofa is covered with a soft sponge seat cushion.
   沙发被一个软海绵坐垫覆盖着。
2. 2.The car seats are made of high-quality sponge seat cushions.
   汽车座椅由高质量的海绵坐垫制成。
3. 3.The baby's crib has a cozy sponge seat cushion for comfort.
   婴儿床有一个舒适的海绵坐垫来提供舒适感。