Side note: In the United States, we often use the terms PVC and Vinyl interchangeably, but in other places, Vinyl can refers to specific applications of the plastic, like flooring or artificial leather.

在美国，我们经常互换使用PVC和氯乙烯这两个术语，但在其他国家，氯乙烯可以指塑料的具体应用，比如地板或人造皮革。