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。
The cells at the top of the pits produce mucus, which protects the stomach lining against gastric acid.
(给舱室注射水使检测器表面回复平坦)注射水进入透镜舱室使得薄膜变成凹半球。
(Injecting water back returns the detector to a flat surface.) Injecting water into the chamber of the lens makes the thin membrane become a convex hemisphere.
一位年轻太太， 这家饭店的一个客人， 正在一间凹室里弹钢琴，使他感到很愉快。
A young lady, a guest of the house, playing a piano in an alcove pleased him.
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