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胃粘膜本身分泌胃酸,使腔内pH值低至1.0,但胃上皮仍能良好耐受,这是由于连续完整的表面细
Gastric mucosa itself secrete acid, so that the cavity pH as low as 1.0, but the gastric epithelium is still well tolerated, which is due to the continuous complete fine surface