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，如胃溃疡，十
溃疡，直溃疡
。
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，如胃溃疡，十溃疡，直溃疡。
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