ethylidene-urea

例句：

1. 1. The compound is used as a preservative in food packaging.
   这种化合物被用作食品包装的防腐剂。
2. 2.Ethylene diamine urea is a common chemical found in fertilizers.
   乙二胺脲是一种常见的化肥成分。
3. 3. The process of making ethylidene-urea involves reacting two chemicals together.
   制造乙二醛尿素的过程涉及将两种化学物质反应在一起。