citric acid

例句：

1. 1.Citric acid is a common ingredient in many baked goods.
   柠檬酸是许多烘焙食品的常见成分。
2. 2.The chemical reaction between citric acid and baking soda produces carbon dioxide gas.
   柠檬酸和苏打反应产生二氧化碳气体。
3. 3. The fruit of the lemon tree contains citric acid, which is used in food preservatives.
   柠檬树的果实含有柠檬酸，用于食品防腐剂。