dilactone

例句：

1. 1. The diacetic acid was used as a solvent in the chemical reaction.
   二乙酸用作化学反应的溶剂。
2. 2.The diacetic acid reacted with water to form diacetone alcohol.
   二乙酸与水反应生成二乙缩醛。
3. 3. The diacetic acid was used as a food preservative.
   二乙酸用作食品防腐剂。