redundancy

中文： 冗余、失业、下岗

1. The state of being redundant. (countable, uncountable)
2. A superfluity; something redundant or excessive; a needless repetition in language. (countable, uncountable)
3. A duplication of components or circuits to provide survival of the total system in case of failure of single components. (countable, uncountable)
4. Duplication of parts of a message to guard against transmission errors. (countable, uncountable)
5. surplusage inserted in a pleading which may be rejected by the court without impairing the validity of what remains. (countable, uncountable)

复数 redundancies