1·He was arrested by plainclothes detectives as he walked through the customs hall.
他穿过海关大厅时被便衣侦探逮捕了。
—— 《柯林斯英汉双解大词典》
2·A plainclothes detective travelled on the train.
一个便衣侦探搭乘火车旅行。
3·A group of plainclothes police went into the house.
一组便衣警察进入住宅。
4·That plainclothes policeman detained the drugpusher.
那名便衣把毒贩给拘留了。
5·Riot police and plainclothes security men have ringed universities.
防暴警察和便衣包围了众大学。
6·The policeman dressed in plainclothes rather than in a uniform.
那位警察穿着便衣，而不是警服。
7·Superiors would evaluate a plainclothes man on his dependability.
上级评价一个便衣人员的标准，是看他是否忠诚可靠。
8·Several plainclothes men were waiting about round the street corner.
几个便衣在街拐角处等待着。
9·Even clergymen visiting the area had to be accompanied by plainclothes policemen.
甚至牧师到这里来都要便衣警察的陪同。
10·They said they were already worried that plainclothes policemen had been taking their names.
他们说已经开始担心便衣警察早已知道他们的名字了。