慢性阻塞性肺病是对损害肺并使人感觉呼吸困难的疾病的总称。
Chronic obstructive pulmonary disease, or COPD, is an umbrella term for diseases that impair lungs and leave people feeling breathless.
之前的研究表明这种基因变种让人类更容易演变成慢性阻塞性肺疾病，而当前的研究则对这种现象给出了一个解释。
Previous research showed that this gene variant makes humans more liable to develop chronic-obstructive disease (COPD), and the current study provides an explanation for this observation.
氧化一氮是哮喘和其他肺疾病的表现，诸如慢性肺病、囊肿性纤维化和支气管扩张（气管的反常的变宽）。
Nitric oxide is asign of asthma and other lung diseases, such as chronic obstructive pulmonarydisease, cystic fibrosis and bronchiectasis (the abnormal widening of airways).
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