Plain clothes
n. 便衣, 便服, 便衣警察; 便装
📖 牛津释义
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.
🧩 词语组成解析
plain
[plein]
n. 平原;平地;[纺织业]平针;朴实无华的东西;
adj. 平的;素的;清晰的;相貌平平的;
adv. 清楚地，明白地;平易地;[用以加强语气]显然;完全地;
vi. 发牢骚;诉苦;
clothes
[kloðz]
n. 衣服，衣物;寝具;
v. 穿（衣）( clothe的第三人称单数);给…提供衣服;（用语言）表达;覆盖;
🗣️ 情景例句
You made a tough decision.
你做了一个困难的决定。
You should take advantage of it.
你应该好好利用这个机会。
They may also have used wood and skins, but these have rotted away.
他们也可能用过木头和兽皮，但这类东西早已腐烂殆尽。