这些自发的巡逻队由平民组成，他们试图在没有警方协助的情况下维持社区安全。

The self-formed patrols consisted of ___vigilantes who tried to keep the neighborhood safe without police assistance.

社区里的治安维持者自发组织巡逻，声称要维护邻里安全。

The ___vigilantes in the neighborhood organized patrols, claiming to keep the area safe.