(noun.) repetition of an act needlessly.
(noun.) the attribute of being superfluous and unneeded; 'the use of industrial robots created redundancy among workers'.
(noun.) (electronics) a system design that duplicates components to provide alternatives in case one component fails.
(noun.) repetition of messages to reduce the probability of errors in transmission.
埃塞尔手打
手打:帕特丽夏