The addition of alkyl groups to PAHs enhanCEs the carcinogenic potential of these compounds.

烷烃加在多环芳烃上的系列会提高这些化合物的致癌作用.

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Four . five and six PAHs have greater carcinogenic potential than do two. three or seven PAHs.

五和六环多环芳烃比二. 三和七环的多环芳烃有更强的致癌作用.

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Four, five and six ring PAHs have greater carcinogenic potential than do two, three or seven ring PAHs.

四, 五和六环多环芳烃比二, 三和七环的多环芳烃有更强的致癌作用.

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