肺癌

    肉是餐桌上必不可少的美食，人们都知道大量食用红肉和加工过的肉食，会增加患肠癌的风险。近日，美国科学家的一项研究首次揭示了红肉与肺癌之间的关系。

　　美国国家癌症研究所的阿曼达·克罗斯博士及其同事对50万名50—71岁的受试者，进行了长达8年的跟踪研究，这些受试者都参加了美国退休者协会的饮食与健康研究项目。

    8年后，有53396名受试者患上癌症。统计数据显示，与吃红肉最少的人相比，吃红肉最多的人患肺癌的风险增加了16%，研究人员表示，即使将吸烟因素考虑在内，红肉与肺癌的关联仍然存在。研究同时发现，吃红肉与胃癌、膀胱癌、白血病、淋巴瘤或恶性黑色素瘤没有关联。

　　这项研究的主持人表示，肉食含有大量饱和脂肪和铁，而饱和脂肪和铁都具有致癌作用，肉食中还含有大量导致基因突变的化学物质，这些都是引发肺癌的重要原因。同时，美国得克萨斯大学的一项研究发现，吃沙拉和园艺活动可以降低患肺癌的风险，对于吸烟者也一样有效。

相关新闻

==== 汉译英 ====
Meat is essential to the food table, eating a lot of people know that red meat and processed meat increase the risk of colorectal cancer risk. Recently, a study by U.S. scientists revealed the first time, the relationship between red meat and lung cancer.
U.S. National Cancer Institute 阿曼达克罗 Weiss and colleagues 500 000 50-71 year old subjects, for as long as 8 years of follow-up study, these subjects participated in the American Association of Retired diet and health research projects. 8 years later, there are 53 396 subjects suffering from cancer. Statistics show that people with eating less red meat than those who ate the most red meat increased risk of lung cancer by 16%, the researchers said, even if smoking into account, the association between red meat and lung cancer remains . The study also found that eating red meat and cancer, bladder cancer, leukemia, lymphoma or malignant melanoma is not associated.
The study of the host that the meat contains a lot of saturated fat and iron, and saturated fat and iron have a carcinogenic effect, meat also contains a large number of chemicals that cause gene mutations, which are an important cause of lung cancer causes. Meanwhile, the U.S. University of Texas study found that eating salad and garden activities can reduce the risk of lung cancer for smokers are just as effective.