"Prevent others from disturbing public order" 或 "Stop others from causing a disturbance to public security" 都可以表达“阻止别人扰乱治安”的意思。其中,“prevent/stop sb. from doing sth.”是常用的阻止某人做某事的句型,“disturb public order”或“cause a disturbance to public security”则准确传达了“扰乱治安”的含义。