plain clothes (esp of police officers)

ordinary clothes, not uniform （尤指警察的）普通衣服, 便衣: The detectives were in plain clothes. 警探穿著便衣. `plain-clothes adj wearing plain clothes 穿便衣的: a plain-clothes detective 便衣侦探.

place-mat, place-name, place-setting, placebo, placement, placenta, placental, placid, placidity, placidly, placket, plagiarism, plagiarist, plagiarize, plagiarize, plagiarise, plague, plague-ridden (also `plague-stricken), plaice, plaid, plain, plain dealing, plain flour, plain-clothes man, plain-spoken, plainchant, plainly, plainness, plains, plainsman, plaint, plaintiff, plaintive, plaintively, plaintiveness, plait, plan, plane, plane geometry, plane sailing, plane-table,