we are living in a new era such as has never existed before.老师，这里的such充当什么成分？
为什么such可以放在new era的后边？
such as 在这里充当关系代词？
We are living in such a new era as has never existed before.老师，这里的such是什么词性？是形容词还是关系代词？
非常感谢!
