单词：colloid adenoma
胶（质）腺瘤, 胶质腺瘤
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It's been protected from human impact since 1909. With three million acres, nearly a half million under water, Superior National Forest is largely unspoiled. But now the survival of this national treasure rest with those who would see some of it bur
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国家地理2008年
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Study Finds Removing Polyps Saves Lives Colon cancer normally starts with growths called polyps inside the intestine. Previous studies have shown that removing polyps can prevent colon cancer from developing. The new study, published in the New Engla
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VOA标准英语2012年(二月)
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