胃酸太多，为什么喝苏打水？

Your stomach uses acid to digest food. 胃靠胃酸来消化食物。 Sometimes the acid becomes too strong. 有时候胃酸会太强。 You feel a burning ache inside. 胃里就觉得火辣辣的。 Soda water is a little bit alkaline. 苏打水带一点点碱性。 Alkali and acid can cancel each other out. 碱和酸碰到一起，能互相抵消。 The burning feeling becomes much better. 烧心的感觉就舒服多了。