power used in testing for acid

例句：

1. 1. The vinegar is made from the fermentation of sugar and water.
   醋是由糖和水发酵制成的。
2. 2. Acids are used in many chemical reactions to break down substances.
   酸在许多化学反应中用于分解物质。
3. 3. The taste of the food was sour, which made me feel uncomfortable.
   食物的味道很酸，这让我感到不舒服。