riot control 治安控制
riot gear 防暴装备
riot police 防暴警察
A: Did you hear the news? The crowd rioted in the city center last night.
A：你听说了吗？昨晚人群在市中心发生了骚乱。
B: Yes, it was quite chaotic, but luckily the police arrived soon.
B：是的，当时场面非常混乱，但幸运的是警察很快就赶到了。
1) 发生骚乱
2) 参与暴乱
3) 表现出狂乱
1. 参与暴乱；发生骚乱
verb
1. To take part in a violent disturbance of the peace by a crowd.
Synonym: revolt, rebel