名词
中文翻译：卧铺
同义词：
['sleeping car', 'sleeper', 'berth']
例句：
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1. We took a train for the long journey and had a comfortable sleep in the sleeper.
我们乘火车长途旅行，在卧铺上睡得很舒服。
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2. The train was so crowded that we had to sleep in the sleepers.
火车太拥挤了，我们不得不睡在卧铺里。
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3. He decided to take a bus instead of a sleeper because it would be faster.
他决定坐公共汽车而不是卧铺车，因为那样会更快。