Even very dangerous carcinogens - like cigarettes and radiation - typically require several years, even decades, to cause cancer.
即使每一个危险的致癌原，像香烟和辐射，通常都需要多年或甚至几十年才会引起癌症。
Even very dangerous carcinogens - like cigarettes and radiation - typically require several years, even decades, to cause cancer.
即使每一个危险的致癌原，像香烟和辐射，通常都需要多年或甚至几十年才会引起癌症。
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