多环芳烃，已知会增加乳腺癌的风险。

PAHs, known to increase the risk of breast cancer.

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多环芳烃同样对胎儿的DNA产生直接影响。

Also, PAHs may affect the fetus' DNA directly.

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这是第二次，但间接的方式多环芳烃可以导致癌症。

This is a second, but indirect, way in which PAHs can cause cancer.

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该法对几种代表性多环芳烃的回收率为75.0-100％。

The recoveries of the method for several PAH were 75-100%.

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该法对几种代表性多环芳烃的回收率为75.0-100％。

The recoveries of the method for several PAH were 75-100%.

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