床垫

例句：

1. 1. She had a comfortable sleep on the soft mattress.
   她在柔软的床垫上睡得很舒服。
2. 2. The old man slept on the old mattress.
   那位老人睡在旧床垫上。
3. 3. He bought a new mattress for his new house.
   他为新房子买了一张新的床垫。