n. a large thick pad filled with resilient material and often incorporating coiled springs, used as a bed or part of a bed
n. 床垫, 空气垫, 沉床
[医] 褥子, 床垫
1. I need to buy a new mattress for my bed.
我需要为我的床买一个新的床垫。
2. A good mattress can improve your sleep quality.
一个好的床垫可以改善你的睡眠质量。
3. She prefers a soft mattress over a hard one.
她更喜欢柔软的床垫，而不是硬的。