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1. The lungs are responsible for the exchange of oxygen and carbon dioxide between the bloodstream and the air we breathe.
肺部负责血液和我们呼吸的空气之间氧气和二氧化碳的交换。
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2. During sleep, the alveoli in the lungs expand to allow more oxygen to reach the bloodstream.
在睡眠期间，肺部的肺泡会扩张，以便更多的氧气到达血液。
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3. Lung disease can lead to problems with the alveoli, which can affect the quality of life for those affected.
肺部疾病可能导致肺泡问题，影响受影响者的生活品质。