Chronic obstructive pulmonary disease (COPD) is a leading cause of disability and death, affecting approximately 11.4 million people in the United States and millions more across the world.
慢性阻塞性肺炎(COPD)是主要的致残和致死的原因。这种疾病影响了近乎1140万美国人，并且在世界范围内更是数以万计。
Chronic obstructive pulmonary disease, or C. O. P. d., affects more than 200 million people around the world.
慢性阻塞性肺疾病(或简称C.O.P.D。)影响了全世界两亿多人的健康。
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