Researchers say no drugs have been clinically proven to prevent lung cancer among those at risk, but several are under investigation.

研究人员说一直没有药物被证实能预防高危人群发生肺癌，但有几种药物正在研究之中。

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Say no... to smoking and drugs!

拒绝…吸烟和品！

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Say no... to smoking and drugs!

拒绝…吸烟和品！

youdao