警察使用了催泪瓦斯来驱散示威活动。
警察正在密切监视嫌疑犯的活动。
The police are keeping a close watch on the suspect's movements.
警察没有采取措施制止犯罪活动的增加。
The police were failing to take measures to check the growth in crime.
6月份，当地警察对已知的两个非法工厂采取了清查活动。
In June, the police carried out a sweep of two known illegal workplaces.
当天晚上，邻居们在警察所外举行庆祝活动。
That evening, the neighborhood celebrated outside the police station.
警察多次召见他，警告他停止活动。
The police summoned him several times to warn him to cease his activities.
警察的职责是防止和侦查犯罪活动。
接下来的活动是演戏：演员将设置一个环境，如厨房，学校，卫生间，警察局等。
Additional activity. The actor set an environment, e. g. Kitchen, School, Bathroom, Police Station...
他们也必须将他们的一切出国旅游活动告知警察。
他们也必须将他们的一切出国旅游活动告知警察。
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