结论多环芳烃类混合物具有较强的遗传毒性，可使职业工人在早期接触阶段出现P 2 1的高表达。
Conclusion Polycyclic aromatic hydrocarbons (PAHs) has a strong genetic toxic effect and can cause P21 level increase in earlier stage among occupational workers.
结论多环芳烃类混合物具有较强的遗传毒性，可使职业工人在早期接触阶段出现P 2 1的高表达。
Conclusion Polycyclic aromatic hydrocarbons (PAHs) has a strong genetic toxic effect and can cause P21 level increase in earlier stage among occupational workers.
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