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학습 통계
CEFR 레벨
난이도
자막 (98 세그먼트)
understanding chronic obstructive
pulmonary disease COPD chronic
obstructive pulmonary disease or COPD is
a lung disease that makes it difficult
to breathe COPD is a long-term disease
that often gets worse over time and is
characterized by inflammation and severe
limitation of airflow in and out of the
lungs COPD is an umbrella term used to
describe a group of breathing conditions
the most common being chronic bronchitis
and emphysema many people living with
COPD may have both emphysema and chronic
bronchitis a few people have both asthma
and COPD cigarette smoking is the
leading cause of COPD long-term exposure
to secondhand smoke or irritants such as
air pollution dust or workplace fumes
and biomass exposure such as wood smoke
can also contribute to COPD an uncommon
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