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1. Thelungs are the primary organs forfiltering air and expelling wastegases.
肺部是过滤空气和排出废气的主要器官。
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2. The lungs play a crucialrole in maintaining the body's balanceof oxygen and carbon dioxide.
肺部在维持身体氧气和二氧化碳平衡中起着关键作用。
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3. Inhaling pollutants cancause respiratory problems, such as asthma andbronchitis.
吸入污染物可能导致哮喘和支气管炎等呼吸问题。