Conclusion Although smokers did not show clinical symptoms, their lung functions had been reduced, especially small airway function.

结论吸烟者在尚无临床症状时，其肺通气功能已明显降低，尤其以小气道功能受损最为严重。

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Method lung ventilation function and small airway function were tested on 77 cases of lung cancer. The results were contrasted with those on 84 normal control subjects.

方法对77例肺癌患者的肺通气及小气道功能进行检测，并与84例健康人进行对照。

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This suggested that obesity might present ventilation deficiency and abnormal function of small airway.

提示肥胖症病人有通气功能不足及小气道功能异常。

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Conclusion Smoking could injure ventilatory function, and initial manifestations are hypofunction mainly in small airway.

结论吸烟影响肺通气功能，早期主要表现为小气道功能减退。

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Conclusion Smoking could injure ventilatory function, and initial manifestations are hypofunction mainly in small airway.

结论吸烟影响肺通气功能，早期主要表现为小气道功能减退。

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