Plain and simple clothes are appropriate for school wear.(樸素的服裝適合在學校里穿。)

The policemen disguised themselves in plain clothes.(警察穿上便服偽裝自己。)

Thee youth with a plain clothes came to the front of the elderly, bent down and whispered: "Sir, I want to buy the house, but I was only 1 million pounds."(一個衣著樸素的青年來到老人眼前，彎下腰，低聲說：：“先生，我也好想買這棟住宅，可我只有1萬英鎊。)

KGB officers in plain clothes were clearly in charge even at the police station, and the arrest itself was as choreographed as the trial to come.(很明顯，當時是由克格勃的便衣警察在掌控局勢，甚至在警署也是如此，逮捕行動和接下來審訊一樣都是他們編排的。)

She always wears plain clothes to work.(她總是穿樸素的衣服去上班。)

The protest might have petered out had not snipers in plain clothes, assumed to be security men loyal to Mr Saleh, fired into crowds in the capital on March 18th, killing some 50 people.(抗議也許會慢慢的消失，但是便衣的狙擊手們可不會，他們假裝成忠誠于薩利赫先生的安全人員，于3月18日朝著人群開火，致使50余人喪命。)

But at dawn, as he and many thousand supporters prepared to gather at a city park, plain-clothes policemen arrested him and, struggling to get through a dense crowd, took him away.(但是就在黎明，就在他準備和成千上萬的支持者在城市公園碰面時，便衣警察逮捕了他并艱難地穿過擁擠的人群將其帶走。)

When the snow flies flying, dressed in a plain clothes conceal her color flow, the world also come because of snow become exceptionally pure, especially enchanting.(當雪花凌空飛揚時，一襲素衣掩不住她的流彩，這個世界也因雪花的蒞臨而變得分外純凈，分外妖嬈。)

Plain clothes are appropriate for school wear.(樸素的衣服適合于上學時穿著。)

They came in a huge truck full of police men, plus two police women, plus a plain clothes intelligence agent and a magistrate.(他們開來了一輛很大的卡車，里滿全是警察，其中有兩名女警。)