aldehyde C-9

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 pollutant in indoor air quality.
   甲醛是室内空气质量中的常见污染物。
3. 3. The laboratory detected trace amounts of formaldehyde in the air.
   实验室检测到空气中有微量的甲醛。