Plain clothes
n. 便衣, 便服, 便衣警察; 便裝
?? 牛津釋義
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 便衣偵探.
?? 詞語組成解析
plain
[plein]
n. 平原;平地;[紡織業]平針;樸實無華的東西;
adj. 平的;素的;清晰的;相貌平平的;
adv. 清楚地，明白地;平易地;[用以加強語氣]顯然;完全地;
vi. 發牢騷;訴苦;
clothes
[kloez]
n. 衣服，衣物;寢具;
v. 穿（衣）( clothe的第三人稱單數);給…提供衣服;（用語言）表達;覆蓋;
??? 情景例句
Well ... what do you think? Do I have my book?
那么， 你看怎么樣 ？我的書可以出版嗎？
One rotten apple spoils the whole barrel.
一只爛蘋果爛一蘿蘋果。
Who were you playing against?
你們和誰踢？