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肺癌是发病率比较高的肿瘤之一。多年来对肺癌病因学的研究认为肺癌是易感宿主吸入大量致癌物质如纸烟烟雾、石棉尘、铀等及其它有害环境因素及种族因素
Lung cancer is one of the tumors with a relatively high incidence. Over the years, studies on the etiology of lung cancer suggest that lung cancer is a susceptible host inhaling large amounts of carcinogens such as cigarette smoke, asbestos dust, uranium, and other harmful environmental factors and ethnic factors.