通过预防癌症，人群中的新发癌症病例将减少。
By preventing cancer, the number of new cases of cancer in a group or population is lowered.
“毫无疑问，通过选择不同的食物，人们可以在改善糖尿病和高血压、甚至预防癌症方面取得很大进展。”纳多说。
"There's no question people can take things a long way toward reversing diabetes, reversing high blood pressure, even preventing cancer by food choices," Nadeau says.
通过检查可获得的证据，专家声称每日补充硒，并不能预防癌症。
Taking a daily supplement of selenium will not ward off cancer, say experts who have reviewed the available evidence.
第一组包括了那些能够发现癌症或者通过发现癌前病变来预防癌症发生的检查。
The first group consists of tests that can detect cancer or prevent it by finding precancerous growths.
第一组包括了那些能够发现癌症或者通过发现癌前病变来预防癌症发生的检查。
The first group consists of tests that can detect cancer or prevent it by finding precancerous growths.
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