para-acetaldehyde

例句：

1. 1. The chemical reaction of para-acetaldehyde produces a gas that can be used as an insecticide.
   丙醛的化学反应产生一种气体，可以用作杀虫剂。
2. 2. In the laboratory, para-acetaldehyde is often used to test the stability of different materials.
   在实验室中，丙醛常用于测试不同材料的稳定度。
3. 3. Para-acetaldehyde is a common byproduct of alcoholic fermentation processes.
   丙醛是酒精发酵过程中的常见副产品。