ESB提供了第三种选择，承诺在支持使用者动态地一次性绑定到服务代理的同时，仍然能够通过代理使用多个提供者和选择新的提供者。

An ESB offers a third choice, a compromise enabling a consumer to dynamically bind to a service proxy just once and yet still be able to use multiple and future providers using the proxy.

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这项建议性法规也许能够创造出第三种雇员——与养老金承诺相比，他们更想获得现金支付。

The proposed rules may create a third set of employees, those who prefer payment in cash to a pension promise.

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