名词
中文翻译：上铺
同义词：
['upper berth', 'upper cot', 'upper bed']
例句：
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1.She has a lower bunk for her younger brother.
她有一个下层的床铺给弟弟。
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2. The upper bunk is usually reserved for the family's youngest child.
上层床铺通常留给家里的小宝宝。
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3.The cabin had only one upper bunk and two lower bunks.
小屋只有一张上层床和两张下层床。