With growing material wealth and advances in science and technology,huaman civilization has developed as never before.

参考译文：随着物质财富的不断增长和科学技术的不断进步，人类文明的发展是前所未有的。

这里的 as never before 作什么成分呢？

as never before作状语成分：其完整形式为”as it has never developed before .