然而这个技术自从那之后就没有再发挥其它作用，直到2009年一个叫中本聪的人采用区块链技术创造了数字加密货币比特币。
This technology, however, has not played any other role since then, until 2009, when a man called Bintwe created a digital encrypted currency, Bitcoin, using block chain technology.
接下来我们再来说下哈希值，它就像区块的指纹一样，用来标识区块和它包含的数据。
And then let's turn to the Hashi value, which is like a fingerprint of a block, to identify the block and the data it contains.
3号区块指向2号区块，2号区块又指向1号区块，1号区块这里有点特殊，它不指向前一个区块，因为它就是这条区块链中的第一个区块，也叫创世区块。假设现在你篡改了2号区块里面的数据，这将使得2号区块的哈希值也跟着发生改变。那么这也将使得3号区块的指向变得非法，进而使得其后续所有区块都变得非法。所以改变一个区块会使得其后续所有区块变得非法。
Block three points to block two, block two points to block one, and block one is a little special here, and it does not point to a block, because it is the first block in the chain, also called the Genesis block. Assuming that you have now tampered with the data in block two, this will change the Hashi value of block two. That would also make the direction of block three illegal, making all of its subsequent blocks illegal. So changing a block would make all of its subsequent blocks illegal.
这个过程我们称之为网络上所有人达成了共识。他们认同网络中哪些区块是合法的，哪些是不合法的，那些被篡改过的区块会被网络拒绝。所以要篡改区块，你需要篡改这个区块后续所有区块，并且控制网络中超过50%的用户。可以说这基本上是不可能做得到的。
This process, we call it a consensus among all the people on the Internet. They agree on which blocks of the network are legal, which are illegal, and those that have been tampered with are rejected by the network. So, in order to tamper with the blocks, you need to tamper with all the blocks and control more than 50% of the users of the network. This is essentially impossible.
区块链本身也在不断发展，后面出现了智能合约技术。智能合约就是存放在区块链上面的程序，它在某些特定的条件下可以自动的执行。因此区块链技术也可以用来存放病史档案，创建数字化公证，商品朔源等等。那么到这里你应该明白了区块链的工作原理以及它的用途啦吧！
The blocks chain itself is constantly evolving, and intelligent contract techniques are behind it. Smart contracts are programs that are stored on the blocks chain, which can be executed automatically under certain conditions. So block chain technology can also be used to store medical records, create digital notaries, commodity files, etc.
原标题：《科普│一文说透区块链到底是什么》
Original title: Koeppu, what the hell is the chain of blocks?
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