Cancer may also occur on inner surface of body, such as gastric ulcer, duodenitis, rectitis and so on.
也可发生在身体内表面，如胃溃
，
指肠溃，直肠溃
。
指肠炎Cancer may also occur on inner surface of body, such as gastric ulcer, duodenitis, rectitis and so on.
也可发生在身体内表面，如胃溃，指肠溃，直肠溃。
声明：以上例句、词性分
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