警官的用法和样例：
例句
-
这位警官负责侦查欺诈案。
This police officer's job is to detect fraud. -
警官使车停住并将司机扣留。
The constable stop the car and arrest the driver. -
警官命令战士们“稍息！”
The sergeant gave his men the command "At ease!" -
调查是在一位高级警官的指导下进行的。
The investigation was carried out under the direction of a senior police officer. -
警官要求这个陌生人出示通行证。
A sergeant asked the stranger to show his pass.
