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Example
警察今天穿便衣，在車站附近觀察可疑人物。
警察今天穿便衣，在车站附近观察可疑人物。
The police officer wore plainclothes today and watched suspicious people near the station.
Usage Notes
Refers to ordinary civilian clothes instead of a uniform and, by extension, to a plainclothes officer. The context determines whether it means the clothing or the person wearing it.
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