名词
中文翻译：Unknown
同义词：
['keeper', 'holder', 'custodian']
例句：
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1. The bank's security guard is the only one allowed to enter the vault.
银行的保安是唯一一个被允许进入保险箱的人。
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2. The police officer was a good holder of his duties.
这位警官很好地履行了他的职责。
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3. The museum has a collection of rare artifacts that are carefully held by experts.
这个博物馆收藏了稀有的文物，这些文物由专家仔细保管。