名词
中文翻译：总钥匙
同义词：
['master key', 'master key system']
例句：
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1. The security guard had the master key to the hotel's safe.
保安有酒店保险箱的钥匙。
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2. The master key system is used to secure sensitive information.
使用主密钥系统来保护敏感信息。
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3. The master key was kept in a locked cabinet in the vault.
主密钥被锁在保险柜里的一个锁着的柜子里。