I have tried
我努力了
gsub("/^(http?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/","","This is a website https://www.example.com/test and needs to be removed",ignore.case=T, perl=T)
gsub("/^(http?:\/\/)?([
阅读背景：
R替换所有作为网站的子串
来源：互联网
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