2的癌症难以避免英语科普英文阅读网_全国大学英语考试服务网-2016年英语四级六级成绩查询
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2的癌症难以避免英语科普英文阅读网

2017-07-14 02:49 |  来源:咕噜英语 |  人气: | 


     
      Two thirds of cancers are unavoidable even if you live a healthy life, a study has shown.研究表明,即使生活方式健康,依然有三分之二的癌症是难以避免的。 by random1 mistakes in the 2 when cells divide.The findings challenge the widespread view that cancer mutations are generally inherited or triggered by environmental factors.Instead, the vast majority of cancers are probably down to unlucky defects in replicating3 DNA4 out of the blue, they suggest.Lead scientist Dr Cristian Tomasetti,, said: "It is well- avoid environmental factors such as smoking to decrease our risk of getting cancer."But it is not as well-known that each time a normal cell divides and copies its DNA to produce two new cells, it makes multiple mistakes."These copying mistakes are a potent5 source of cancer mutations that historically have been scientifically undervalued, by these mistakes."The research, published in the journal Science, indicates that almost two-thirds of cancer- mutations are due to DNA copying errors.
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