TED演讲:区块链对货币和商业的影响(5)

 And then -- this is the key part -- that block is linked to the previous block 随后是关键的部分，该区块连接到前一个区块，

and the previous block to create a chain of blocks. 以及更前面的区块，形成了一连串的区块。

And every one is time-stamped, kind of like with a digital waxed seal. 每一个区块都是时间标记，有点像是数字蜡印。

So if I wanted to go and hack¹ a block and, say, pay you and you with the same money, 假如说我想要破解其中的一个区块，比方说给你还有你一样的金钱，

I'd have to hack that block, plus all the preceding blocks, 我需要破解那个区块和前面所有的区块，

the entire history of commerce on that blockchain, 就是那区块链上完整的交易历史，

not just on one computer but across millions of computers, simultaneously², 并不只是破解一台电脑，而是要同时破解数亿台电脑，

all using the highest levels of encryption, 它们都使用着最高级别的加密技术，

in the light of the most powerful computing³ resource in the world that's watching me. Tough to do. 世界上最强大的计算资源正在监视着我。几乎不可能的任务。

And this is infinitely⁴ more secure than the computer systems that we have today. 比起我们现有的计算机系统，这绝对要安全得多。

Blockchain. That's how it works. So the Bitcoin blockchain is just one. 区块链，这就是它工作的原理。而比特币的区块链只是其中之一。

There are many. The Ethereum blockchain was developed by a Canadian named Vitalik Buterin. 还有许多种类。以太坊区块链由加拿大人维塔利·布塔林开发。

He is 19 years old, and this blockchain has some extraordinary capabilities⁵. 他只有19岁。（实际年龄应为22岁）这一区块链有一些无与伦比的特点。

One of them is that you can build smart contracts. It's kind of what it sounds like. 其中之一是你可以制定智能合约。它正如其名。

It's a contract that self-executes, and the contract handles the enforcement, the management, performance and payment 它是自我执行的合约，合约负责处理强制措施，经营管理，工作情况和支付方式，

the contract kind of has a bank account, too, in a sense -- of agreements between people. 某种意义上来说，该合约也有一个银行账户，是关于人们之间的协议。

And today, on the Ethereum blockchain, there are projects underway to do everything 如今，通过以太坊的区块链，有各种工程进行着各种任务，

from create a new replacement⁶ for the stock market to create a new model of democracy, where politicians are accountable to citizens. 从创造新的股票市场的替代品，到创立一个政客对公民真正负责的民主制度的新模型。

1 hack   

n.劈，砍，出租马车；v.劈，砍，干咳

参考例句：

• He made a hack at the log.他朝圆木上砍了一下。
• Early settlers had to hack out a clearing in the forest where they could grow crops.早期移民不得不在森林里劈出空地种庄稼。

2 simultaneously   

adv.同时发生地，同时进行地

参考例句：

• The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
• The Windows allow a computer user to execute multiple programs simultaneously.Windows允许计算机用户同时运行多个程序。

3 computing   

n.计算

参考例句：

• to work in computing 从事信息处理
• Back in the dark ages of computing, in about 1980, they started a software company. 早在计算机尚未普及的时代（约1980年），他们就创办了软件公司。

4 infinitely   

adv.无限地，无穷地

参考例句：

• There is an infinitely bright future ahead of us.我们有无限光明的前途。
• The universe is infinitely large.宇宙是无限大的。

5 capabilities   

n.能力( capability的名词复数 )；可能；容量；[复数]潜在能力

参考例句：

• He was somewhat pompous and had a high opinion of his own capabilities. 他有点自大，自视甚高。 来自辞典例句
• Some programmers use tabs to break complex product capabilities into smaller chunks. 一些程序员认为，标签可以将复杂的功能分为每个窗格一组简单的功能。 来自About Face 3交互设计精髓

6 replacement   

n.取代，替换，交换；替代品，代用品

参考例句：

• We are hard put to find a replacement for our assistant.我们很难找到一个人来代替我们的助手。
• They put all the students through the replacement examination.他们让所有的学生参加分班考试。