名词
中文翻译：肺泡
同义词：
['alveoli', 'alveolarair sacs']
例句：
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1.The lungs are responsible for the exchangeof oxygen and carbon dioxide between theblood and the alveoli.
肺部负责血液和肺泡之间氧气和二氧化碳的交换。
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2. Alveoli play a crucialrole in the body's respiratory system.
肺泡在身体呼吸系统中起着至关重要的作用。
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3. During sleep, the alveolibecome smaller, allowing less oxygen to reachthe rest of the body.
睡眠时，肺泡变小，使得身体获得的氧气减少。