bounding bed

例句：

1. 1. The new king-size bed is the perfect size for a family of four.
   新款的特大号床是四个人家庭的理想选择。
2. 2.She spent the whole night on her back, feeling the mattress's softness.
   她整晚都仰卧着，感受着床垫的柔软。
3. 3. He bought a new mattress to replace his old one, which had started to sag.
   他买了一个新的床垫来替换他的旧床垫，因为旧的已经开始变形了。