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在单纯用香烟熏吸法复制小鼠慢性支气管炎的模型中，结果显示吸烟不仅引起慢性支气管炎，而且还促发小鼠肺内部分呼吸性细支气管等上皮细胞的腺瘤样增生和少数恶变倾向。
In a model of chronic bronchitis in mice that was simply smoked by cigarette smoking, the results showed that smoking not only causes chronic bronchitis, but also promotes adenomatous hyperplasia and a few malignant changes in epithelial cells of the respiratory bronchioles in mouse lungs. tendency.