名词
中文翻译：Unknown
同义词：
['1. air', 'atmosphere', 'breath']
例句：
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1. 空气
air
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2. 呼吸
breathing
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3. 呼吸系统
respiratory system
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1. The air quality is poor due to the heavy pollution.
由于严重的污染，空气质量差。
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2. Breathing exercises can help improve lung function.
做呼吸练习可以帮助提高肺功能。
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3. The respiratory system is responsible for filtering and regulating the exchange of gases between our body andthe environment.
呼吸系统负责过滤和调节我们身体与环境之间气体交换。