名词
中文翻译：Unknown
同义词：
['duty call', 'duty visitation例句：1. The doctor was on duty when the patient arrived.（病人到达时，医生正在值班。）2. The policeman made a duty visit to the crime scene.（警察去犯罪现场进行了一次职责访问。）']
例句：
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1. The doctor was on duty when the patient arrived.
病人到达时，医生正在值班。
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2. The policeman made a duty visit to the crime scene.
警察去犯罪现场进行了一次职责访问。
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3. The firefighters were on duty during the emergency.
消防员在紧急情况下正在进行职责访问。