[俚语] 便衣警察
[俚语] 精明（或内行）的警察；摩托化警察部队的警察

这条街上每天都有几个便衣警察。
There are several fly cops on the street every day.

COP cop fly speed-cop yarn cop no cop cop out cop it cop winder cop-out not much cop C.O.P. cop-cop-yarn Fly spinning cop cop change cop changer cop steamer COP-BLEO