flat sour bacteria

例句：

1. 1. Flat sour bacteria can causeunpleasant gases to be produced in thestomach.
   平酸细菌可以在胃中产生不愉快的气体。
2. 2. The presence of these bacteria canlead to digestive discomfort for some people.
   这些细菌的存在可能导致某些人消化不良。
3. 3. Researchersare studying how to controlthe growth of flat sour bacteriain the gut.
   研究人员正在研究如何控制肠道内平酸细菌的生长。