Each individual grouping of transactions is turned into a block and chained to the existing ledger. As soon as a block is additional it can't be reversed or altered — And that's why folks explain blockchains as "immutable." 区块链是一个交易数据库，在网络上多台电脑之间更新和共享。每次添加一组新交易时，就称其为“区块”，这也是区块链名称的由来。以太坊这样的公开区块链，允许任何人添加数据，... https://judahneres.nico-wiki.com/836511/what_does_btc_mean