Samples of stomach fluid were taken from the volunteers an hour later and analysed.
一小时后从志愿者胃液中提取样本进行分析。
Before I could shower, I had a stomach upset and without breakfast it unwillingly threw up some stomach fluid.
结果一阵反胃，空腹还没吃早餐的胃，就不争气的呕吐了一些胃酸出来。
Researchers found that the stomach fluid of affected horses was highly acidic and suggested that windsucking is a defense mechanism that increases salivation.
研究人员还发现，出现该类行为的马，它们胃液中胃酸含量非常高，因而咽气癖实际是一种能增加唾液分泌的防御机制。
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