细胞色素氧化酶p 4501a2 (CYP1A2)在药物代谢、前致癌物激活的过程中起重要的作用。

Cytochrome P4501A2 (CYP1A2) plays a critical role in the oxidative metabolism of a variety of exogenous compounds such as drugs, environmental procarcinogens and other xenobiotics.

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今天人们对化学药剂和癌症的了解已比20年前增加了很多。可是，由于对致癌物的危险界限仍搞不清楚，这就妨碍了作出决定。

Much more is known about chemicals and cancer today than just 20 years ago, yet uncertainty about the risk of borderline carcinogens continues to hamper decisions.

youdao

今天人们对化学药剂和癌症的了解已比20年前增加了很多。可是，由于对致癌物的危险界限仍搞不清楚，这就妨碍了作出决定。

Much more is known about chemicals and cancer today than just 20 years ago, yet uncertainty about the risk of borderline carcinogens continues to hamper decisions.

youdao