These are combined in a chemical reaction to create ethylene dichloride, which is turned into a gas, and then, through a process called " polymerization" , it becomes a fine, white powder called polyvinyl chloride, or PVC.

化学反应中结合，生成二氯乙烯，成气体，然后，通一个叫做“聚合”，成一种白色细粉末，叫做聚氯乙烯，简称PVC。