Rather than punctuating the music content, as is done on radio or TV, some of the online services can still use advertising support.
句子里as is done 是什么用法?
as is done on radio or TV,按传统语法是“非限制性定语从句”,as 指代前文punctuating the music content(插播音乐),as 作定语从句的主语。按现代语法是“比较状语从句”,“正如在广播电视上所做的那样”,与前文punctuating the music content 作比较。
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