These are the gastric pits and each one is lined with a number of different types of cell, producing a separate, important gastric secretion.
它们就是胃小凹，每个胃小凹内衬有许多不同的细胞，产生不同的、重要的胃分泌物。
The cells at the top of the pits produce mucus, which protects the stomach lining against gastric acid.
胃小凹顶部的细胞则产生胃黏液，通过胃膜的保护使胃不受胃酸的伤害。
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