ROS本身就是一个重要的致癌物质，它可引起基因突变和染色体修饰，诱导癌变。
Because the ROS can result in gene mutation and chromosome modification, it is the important carcinogen.
南瓜能消除致癌物质的突变作用，制止癌细胞出现。
Pumpkin can remove the choppy effect of carcinogen and check cancer cell appears.
研究认为：“这项结果相当重要，因为多环芳香环氧二醇（PAH diol epoxides）易与DNA反应，引发突变，所以被认为是吸烟产生的众多环芳香烃中最严重的致癌物质。”
"These results are significant because PAH diol epoxides react readily with DNA, induce mutations, and are considered to be ultimate carcinogens of multiple PAH in cigarette smoke, " the study said.
研究认为：“这项结果相当重要，因为多环芳香环氧二醇（PAH diol epoxides）易与DNA反应，引发突变，所以被认为是吸烟产生的众多环芳香烃中最严重的致癌物质。”
"These results are significant because PAH diol epoxides react readily with DNA, induce mutations, and are considered to be ultimate carcinogens of multiple PAH in cigarette smoke, " the study said.
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