Each grouping of transactions is became a block and chained to the prevailing ledger. As soon as a block is added it can't be reversed or altered — which is why persons describe blockchains as "immutable." 你是否使用过更改过服务条款的产品？或者删除了你认为有用的功能？一旦智能合约发布到以太坊，只要以太坊存在，它就会一直在线并运行。就连创作者也无法让它离线。由于智能合约是自动化的，它们... https://ethbase62470.qowap.com/88370529/article-under-review