随着无人机作战的出现，许多传统轰炸机已经变得多余了。

With the advent of drone warfare, many traditional bombers have become ___redundant.

技术变革的无情步伐常常使既有的方法变得多余。

The relentless pace of technological change often renders established methods ___redundant.

新软件实施后，几个文员岗位变得冗余了。

After the new software was implemented, several clerical positions were made ___redundant.