二，Mike版的早期定义A hard fork is when the rules of the Bitcoin protocol change such that old nodes refuse to accept blocks created by newer nodes. As rule violating blocks are ignored, miners will produce blocks building on the last block they saw that followed their rule set.
【硬分叉】比特币的协议发生了一些变化，以至于旧节点不接受新节点所创建的区块。随着这些冲突区块被对方节点抛弃，矿工们将在他们各自的协议中认为正确的最近一个区块上添加区块。
A soft fork is when the rules of the Bitcoin protocol change such that old nodes don’t realise the rules are different, and continue to accept blocks created by newer nodes that follow the changed rule set. Miners may build on top of blocks that they didn’t fully understand or validate.
【软分叉】比特币的协议发生了一些变化，但旧节点不能发现这个协议的变化，从而继续（兼容地）接受新节点用新协议所挖出的区块。旧节点矿工将可能在他们不能完全理解和验证的新区块上继续添加区块。