危机警务，指人民警察对危机事件的预防、处置与善后处理的警察活动。

Crisis policing refers to the people's policeman's activities of preventing, disposing and afterward disposal of the crisis incidents.

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警察使用了催泪瓦斯来驱散示威活动。

Police used tear gas to break up a demonstration.

《柯林斯英汉双解大词典》

当武装警察突袭了这辆汽车时，这起恐怖活动就此结束。

The terror ended when armed police swooped on the car.

《柯林斯英汉双解大词典》