acetaldehyde ammonia

例句：

1. 1. Acetaldehyde is a colorless liquid that can be used as an industrial solvent.
   乙醛是一种无色液体，可以作为工业溶剂使用。
2. 2. The chemical reaction of acetaldehyde with water produces carbon dioxide and acetic acid.
   乙醛与水的反应化学方程式为CO2 + H2O → CH3COOH。
3. 3. In the food industry, acetaldehyde is often used as a preservative in canned foods.
   在食品工业中，乙醛常被用作罐装食品的防腐剂。