名词
中文翻译：硬床
同义词：
['hard bed', 'hard pillow', 'hard mattress']
例句：
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1. I need to sleep on a hard bed to recover from the long flight.
我需要睡在硬床上，才能从长途飞行中恢复过来。
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2. The old man had a hard pillow for his back pain.
这位老人有一个硬枕头来缓解背部疼痛。
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3. The new mattress is very comfortable and provides good support for my back.
新床垫非常舒适，对我的背部提供了良好的支撑。