手术前病人的结肠和直肠必须排空。

The rectum and colon must be completely empty before surgery.

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结肠和直肠癌是西方国家发生率最高的癌症之一。

Colorectal cancer is one of the most prevalent cancers in the Western world.

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大肠癌包括结肠癌和直肠癌，是常见的恶性肿瘤。

Colorectal cancer is a kind of common and malignant tumor.

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什么是结肠癌和直肠癌？

What is cancer of the colon and rectum?

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什么是结肠癌和直肠癌？

What is cancer of the colon and rectum?

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