形容词
中文翻译：Unknown
同义词：
['non-smoking', 'smokeless']
例句：
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1. The restaurant is smoke-free zone, so please don't smoke here.
这家餐厅是无烟区，请在这里不要吸烟。
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2. This area has been smoke-free since the ban on smoking was implemented.
自从实施禁烟令以来，这个区域一直是无烟的。
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3. Many people choose to live in smoke-free areas for health reasons.
出于健康原因，许多人选择住在无烟区。