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1.The alveolar sphere is a structure in the lungs that plays a crucial role in gas exchange.
肺泡囊是肺部的一种结构，在气体交换中起着至关重要的作用。
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2. During sleep, the alveolar spheres expand to allow for better oxygenation of blood.
睡眠时，肺泡囊扩张，以促进血液更好的氧合。
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3.Inhaling air through the nose and mouth can cause the alveolar spheres to expand, which can lead to respiratory distress.
通过鼻子和嘴巴吸入空气可能会导致肺泡囊膨胀，这可能导致呼吸困难。