aldehyde acids

例句：

1. 1. The chemical reaction of formaldehyde and water produces ammonia gas.
   甲醛和水的反应产生氨气。
2. 2.Formaldehyde is a common component in many types of wood preservatives.
   甲醛是许多木材防腐剂的常见成分。
3. 3.Acetaldehyde is a toxic compound that can cause headaches and nausea.
   乙醛是一种有毒化合物，可能导致头痛和恶心。