最通俗易懂的说下什么是区块链？区块链是给予非常特定类型的数据结构的名称，该结构在一旦添加数据的情况下使用，不仅可以不修改，而且可以被任何人公开查看。
What is the most common and understandable description of a block chain? The block chain is the name given to a very specific type of data structure that, once added to the data, can be used not only unmodified but also publicly viewed by anyone.
由于它是比特币等加密货币建立在其基础上的基础数据结构，因此最近有很多新闻报道。虽然加密货币是非常复杂的软件，但区块链本身非常简单。
Because it is a basic data structure based on encrypted currency, such as bitcoin, there have been a lot of news reports recently. Although encrypted currency is a very complex software, the block chain itself is very simple.
考虑一个非常简单的文本文件，其中每个条目由三行组成。
Consider a very simple text document, each of which consists of three rows.
第一行，我稍后会解释
First line, I'll explain later.
第二行是一个简单的字符串helloworld
The second line is a simple string
第三行是第一行和第二行的SHA256结果。
The third line is the result of SHA256 in the first and second rows.
第一行是前面的第三行，因为这是我们区块链中的第一个条目，我们将哈希集用于全零。我们在区块链中添加另一个条目。现在，它似乎并不十分令人兴奋，但很重要的东西刚刚发生。
The first line is the third line, because it's the first entry in our block chain, and we use the Hashi collection for zero. We add another entry in the block chain. Now, it doesn't seem very exciting, but something important just happened.
区块链现在被认为是“不可变的”，这只是一种说法，它无法改变。嗯，这不完全正确，当然你可以更改区块链中的文本，但是当有人检查区块链并计算每个条目SHA256时，他们会发现区块链已被更改并且不再有效。
The block chain is now considered “irreversible”, which is just a term that cannot be changed. Well, that's not entirely true, of course, you can change the text in the block chain, but when someone checks the block chain and calculates each entry SHA256 they find that the block chain has been altered and is no longer valid.
? 让我们在区块链中添加另一个条目，因为Blockchains（区块链联盟）是不可改变的;合同，协议，货币分类账等都可以添加到区块链中，只要区块链有效，就可以添加到区块链中。（欢迎转载分享）
♪ Let's add another entry to the block chain, because Blockchains (the block chain alliance) is unchangeable; contracts, agreements, currency ledgers, etc. can be added to the block chain, and so long as the block chain is valid, it can be added to the block chain. (Welcomed to share)
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