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?лок?ейн ?оби?? благод?йн???? б?л?? п?озо?о?, е?ек?ивно? ? в?д??еж?вано?Some cryptocurrencies share a blockchain, though other cryptocurrencies function by themselves separate blockchains.Blockchains are exceptional in that, at the time a transaction has been recorded and verified, it could?�t be modified. T