巡逻警官

例句：

1. 1. The police are conducting a thorough investigation into the crime scene.
   警方正在对犯罪现场进行彻底的调查。
2. 2. The detectives were sent to the scene to perform a patrol.
   侦探们被派去现场执行巡逻任务。
3. 3. The firefighters performed a thorough patrol of the area before entering the building.
   消防员在进入大楼之前，对该地区进行了彻底的巡逻。