警员的用法和样例：
例句
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警察局说该局反对非执法人员私自执法，可是辖区警员及当地居民对该［警卫］公司的策略颇感兴趣。
The Police Department says it opposes vigilante justice, but officers on the beat and neighborhood residents say they are enthusiastic about the company's tactics. -
警员史密斯和琼斯正在巡逻。
Police Constable Smith and Jones are on patrol.
