名词
中文翻译：Unknown
同义词：
['police officers', 'patrolmen', 'constables']
例句：
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1. They were called to the scene of the accident to investigate.
他们被召到事故现场进行调查。
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2. The policemen were trying to find a suspect in the case.
警察们正在试图在案件中找出嫌疑人。
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3. The policemen were very helpful and professional.
警察们非常乐于助人和专业。