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我找到这个

 

 linked beta-carotene, which is naturally found in carrots, squash, spinach, and other colorful vegetables, to an increased lung cancer risk in smoker。

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說了你別笑. very funny -2kidsMomCa- 给 2kidsMomCa 发送悄悄话 2kidsMomCa 的博客首页 (297 bytes) () 03/12/2019 postreply 19:32:07

就是你这个。还有最权威癌症政府网站的总结https://www.cancer.gov/about-cancer/causes-p -shakuras2000- 给 shakuras2000 发送悄悄话 (0 bytes) () 03/14/2019 postreply 20:23:04

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