A block over a blockchain is often a file which contains a block header, transaction counter, as well as transactions recorded inside the block. The transaction counter lists the quantity of transactions are from the block, when the block header is made up of several components: 用户有一种安全的、内置保障机制，仅当用户表示同意后，资金才能够转手。同样，开发者可以确信相关规则将不会变化... https://ethbase.net/bitcoin-balks-at-the-summit-ethereum-continues-its-ascent