Colorectal cancer is a kind of common and malignant tumor.

大肠癌包括结肠癌和直肠癌，是常见的恶性肿瘤。

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However, still lack an ideal tumor marker of colorectal cancer.

但是，迄今为止尚无理想的肿瘤标记物。

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However, still lack an ideal tumor marker of colorectal cancer.

但是，迄今为止尚无理想的肿瘤标记物。

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