dialkene

例句：

1. 1.The reaction of ethylene with carbon monoxide produces propylene, a di-olefin.
   乙烯与一氧化碳反应生成丙烯，是一种二烯。
2. 2.The discovery of this new compound has led to significant advancements in the field of materials science.
   这种新化合物的发现在材料科学领域取得了重大进展。
3. 3. The di-olefin is used as a precursor in the production of plastics and rubber.
   这种二烯作为塑料和橡胶的前体被使用。