redundant

/ɹɪˈdʌn.dənt/ 形容词 B2

中文：冗杂、冗余

Superfluous; exceeding what is necessary (and therefore no longer needed because other things fulfill its task or purpose).
Repetitive or needlessly wordy.
Duplicating or able to duplicate the function of another component of a system, providing backup in the event the other component fails.
Containing duplicate pathways to send a message.
Obsolete or outdated; discarded, or fit to be discarded.

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