ESB使用弹性SOA所需的标准或自定义中间件来提供服务位置透明性、协议转换和一系列其他功能。

An ESB provides service location transparency, protocol conversion, and a number of other functions using standard or custom mediations that are required for a resilient SOA.

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有了标准API，供应商就可以有自己的实现，开源实现也能在性能、易用性、对弹性云的支持、可伸缩性等更多方面和供应商的产品展开竞争。

With a standard API, the argument goes vendors and open source implementations can compete on performance, ease of use, cloud elasticity support, scalability and more.

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然而，FED可以绕过市场在贴现窗口直接贷款给银行，它们的抵押标准更具弹性。

However, the Fed can bypass the markets and lend directly to Banks at its discount window, where collateral standards are more flexible.

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