adj.便衣(尤指不穿制服的警察)的;
例句:
Plainclothes policemen were waiting in the dark for the burglars to show up.
5便衣警察在黑暗里等着盗贼出现.
A plainclothes policeman detained the drugpusher.
一名便衣警察拘留了那个毒贩.
A plainclothes policeman tailed that thief.
一名便衣警察跟踪那个小偷.