You also learned how addition polymerization reactions work.

您还了解了加成聚合反应的工作原理。

Well, ethene based polymers form through a process called addition polymerization.

好吧，基于乙烯的聚合物是通过称为加聚的过程形成的。

And, in the case of addition polymerization it attacks the double bond and joins one of the carbons, while the other carbon is itself left with an unpaired electron.

而且，在加成聚合的情况下， 它会攻击双键并连接一个碳，而另一个碳本身会留下一个未配对的电子。