paraformal-dehyde

例句：

1. 1.The chemical was found to be a paraformal-dehyde, whichis toxic to humans.
   这种化学物质被发现是一种副醛，对人类有毒。
2. 2. The researchteam discovered that the paraformal-dehydehad been used in the manufacturing process.
   研究团队发现，这种副醛在生产过程中被使用。
3. 3. The paraformal-dehyde was used as a preservative in food storage.
   这种副醛被用作食品储存的防腐剂。