redundance, redundancy, superfluity 都可用于表示冗余。
参考例句:
1、原生XML数据库都是以牺牲存储空间并容忍冗余为代价来换取性能的。
Native XML databases are all about sacrificing storage and tolerating redundance in exchange for performance.
2、同时还利用对象冗余服务技术和Agent容错技术来提高系统的可靠性和吞吐率。
At the same time, it uses object redundance servers technique and Agent fault-tolerant technique to improve the reliability and the throughput ratio.
3、不管说话音量的大小如何,其中总有可能包含一些冗余信息。
At any volume, there's still such a thing as too much information.