第三人称复数：plainclothesmen
1. 便衣警察：Stowaway 偷渡者,逃票的乘客 | Plainclothesman 便衣警察 | Police dog 警犬
2. 便衣刑警：plainchant 单声圣歌 | plainclothesman 便衣刑警 | plainly 平坦地
3. 便衣：Stowaway 偷渡者,逃票的乘客 | Plainclothesman 便衣** | Police dog 警犬
4. 便衣/便衣刑警/侦探：plainclothes /便衣/ | plainclothesman /便衣/便衣刑警/侦探/ | plained /澄清的/
noun
1. a detective who wears civilian clothes on duty