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Nodes validate and broadcast transactions, Every retaining a duplicate of the blockchain for possession verification.[65] A new block is developed every 10 minutes on average, updating the blockchain throughout all nodes without the need of central oversight.ا?أ?راد ا?أع?ا? ا??ط?ر?? ا?بدا?ة ??? ?ع?? ?جب ع??? ?عر?ة ا??صاد