名词
中文翻译：Unknown
同义词：
['ventilation', 'oxygenation', 'ventilation rate']
例句：
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1. The air quality in the city is poor due to high levels of pollution.
由于污染水平高，城市的空气质量很差。
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2. The plant needs more oxygen to grow properly.
植物需要更多的氧气才能正常生长。
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3. The hospital has implemented stricter ventilation measures to improve air quality.
医院实施了更严格的通风措施来改善空气质量。