如果火山灰在底层空气中高浓度聚集，那些患有哮喘、肺气肿或者支气管炎等慢性呼吸道疾病人更容易受刺激。
People with chronic respiratory conditions like asthma, emphysema or bronchitis may be more susceptible to irritation if ash is in the lower atmosphere in high concentrations.
如果火山灰在底层空气中高浓度聚集，那些患有哮喘、肺气肿或者支气管炎等慢性呼吸道疾病人更容易受刺激。
People with chronic respiratory conditions like asthma, emphysema or bronchitis may be more susceptible to irritation if ash is in the lower atmosphere in high concentrations.
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