发酵作用

例句：

1. 1. The wine is fermenting in the bottle.
   酒在瓶里发酵。
2. 2.Fermentation is a natural process that occurs when yeast converts sugar into alcohol and carbon dioxide.
   发酵是一种自然过程，酵母将糖转化为酒精和二氧化碳。
3. 3.During fermentation, the bacteria break down complex carbohydrates into simpler compounds.
   在发酵过程中，细菌将复杂的碳水化合物分解成更简单的化合物。