比特币的白皮书是什么时候发布的？

在比特币出现之前，美国曾经经历了一场金融危机。危机的前兆出现在2007年4月份，当时新世纪金融公司（美国第二大次级房贷公司）破产后，美国就暴露了次级抵押债券的风险；而四个月过去后，也就是2007年8月，美联储为了增强市场的信心，向金融体系注入流动性(压低汇率)，终于使得美国股市维持在高位。

Before Bitcoin, the US experienced a financial crisis. The precursor to the crisis was in April 2007, when the US exposed the risk of sub-prime mortgage bonds after the collapse of the New Century Finance Corporation (the second-largest sub-prime mortgage company in the United States); and four months later, in August 2007, the Fed, in an effort to boost market confidence, injected liquidity into the financial system (lower exchange rates), finally keeping the US stock market high.

比特币系统是一种点对点传输的去中心化的电子现金系统，它解决了在没有中心机构的情况下，总数量恒定的加密货币的发行与流通问题。

The Bitcoin system, a decentralised electronic cash system for point-to-point transmission, addresses the issue and circulation of a constant total number of encrypted currencies in the absence of a central institution.

只要使用比特币系统进行汇款转账，就可以实现交易信息公开透明化，能够毫无顾虑地给世界上另一边的人转钱（BTC），而比特币系统内的所有转账汇款信息都会被全网记录。比特币白皮书的问世，也标志着区块链（BTC的底层技术）的诞生。

By using the Bitcoin system for the transfer of remittances, open and transparent information on transactions can be transferred to people on the other side of the world without fear, and all transfer information in the Bitcoin system will be recorded online. The birth of the Bitcoin White Paper also marks the birth of the block chain (the bottom technology of the BTC).