形容词
中文翻译：简单的
同义词：
['simple', 'unadorned', 'uncluttered']
例句：
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1. The plain clothes made him look more professional.
他穿着朴素的衣服看起来更专业。
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2. The plain design of the dress is very popular among young women.
这件裙子的设计简单，很受年轻女性欢迎。
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3. He wore a plain shirt to the party, which was quite unusual.
他在派对上穿了一件简单的衬衫，这很不同寻常。