临时警察，纠察（英国在非常时期协助警察维持治安）(in Britain) a person who is not a professional police officer but who is trained to help the police force, especially during an emergency
n.
1.
intheUnitedKingdom, somebodywhoactsasavolunteertosupplementthepoliceforce, especiallyonoccasionswhenalargepoliceforceisnecessary, e.g. emergenciesordemonstrations