名词
中文翻译：睡眠者
同义词：
['passenger', 'sleeper car', 'sleeper compartment']
例句：
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1. The trainhas a sleeper compartment for the overnight journey.
火车有一个卧铺车厢，供夜间旅行使用。
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2. The sleeper compartment was so comfortable that I slept soundly all night.
卧铺车厢非常舒适，我整晚都睡得安稳。
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3. The sleeper compartment is located at the back of the train, away from the noise.
卧铺车厢位于火车后部，远离噪音。