ethyleneamines

例句：

1. 1. Ethylenediamine is a key intermediate in the production of polyamides, which are used in various industrial applications.
   乙二胺是生产聚酰胺的关键中间体，用于各种工业应用。
2. 2. The chemical industry heavily relies on ethylenediamine for its production processes.
   化工行业严重依赖乙二胺进行生产过程。
3. 3. Ethylenediamine can be synthesized from natural gas, making it an environmentally friendly alternative to traditional petrochemicals.
   乙二胺可以从天然气中合成，使其成为与传统石化产品相比更环保的选择。