请问这句英语中最后的关系从句中的关系代词that指的是什么?
问题描述：
请问这句英语中最后的关系从句中的关系代词that指的是什么?
This marks one of the biggest changes in the Internet's domain name system,the addressing system of the Internet,that has ever occurred.
答
This marks one of the biggest changes in the Internet's domain name system,the addressing system of the Internet,that has ever occurred.直译：这标志“互联网域名系统 亦即互联网编址系统的”最重要的变化...