名词
中文翻译：站岗人员
同义词：
['staff member', 'duty officer']
例句：
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1. The security guard is the only person allowed to enter the restricted area.
保安是唯一一个被允许进入受限区域的人。
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2. The policeman was called to the scene to investigate the accident.
警察被叫到现场调查这起事故。
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3. The firefighters were on standby for any emergency calls.
消防员随时待命，以应对任何紧急呼叫。