This bicarbonate-rich mucus protects the gastric mucosa from our own gastric acid, so it won't get digested along with food.

这种富含碳酸氢盐的黏液，保护胃黏膜不受我们自身胃酸的影响，使其不至于和食物一起被消化。

Alcohol may also slow down stomach emptying, which could lead to increased production of gastric acid.

酒精也可能会减缓胃排空，从而导致胃酸分泌增加。

For example, it produces an enzyme called urease that helps protect it from the surrounding gastric acid.

例如， 它会产生一种称为脲酶的酶，有助于保护它免受周围胃酸的影响。

Another common symptom is regurgitation, where undigested food and a bit of gastric acid go back up into the mouth, and can cause acidic taste, or even damage of the enamel layer of teeth.

另一个常见的症状是反流，未消化的食物和少量的胃酸返流入口腔导致酸味，甚至牙釉质损坏。

Why this should have happened is not entirely clear, but one possible explanation is that sleeping on the left keeps the junction between the stomach and oesophagus above the level of the gastric acid.

为什么会发生这种情况并不完全清楚，但一个可能的解释是，左侧睡觉可以使胃和食道之间的交界处保持在胃酸水平之上。

When the pressure is lower than normal, which means the sphincter becomes looser, gastric acid reaches the esophagus and the pH of the esophagus drops from to around 4 - which is called acid reflux.

当压力低于正常值时，意味着括约肌松弛，胃酸接触到食管，食管的pH降至4左右，这称为胃酸反流。