re·dun·dan·cy /rɪˈdʌndən(t)si/
 冗餘
 redundancy
 多餘性;冗餘
 redundancy
 冗餘
 Re·dun·dance Re·dun·dan·cy n.
 1. The quality or state of being redundant; superfluity; superabundance; excess.
 2. That which is redundant or in excess; anything superfluous or superabundant.
    Labor . . . throws off redundacies.   --Addison.
 3. Law Surplusage inserted in a pleading which may be rejected by the court without impairing the validity of what remains.
 ◄ ►
 redundancy
      n 1: repetition of messages to reduce the probability of errors
           in transmission
      2: the attribute of being superfluous and unneeded; "the use of
         industrial robots created redundancy among workers" [syn:
         redundance]
      3: (electronics) a system design that duplicates components to
         provide alternatives in case one component fails
      4: repetition of an act needlessly