dead-level abstracting 死线抽象 ; 固定层次抽象法
Defined as such, SOA is a collection of patterns for building an enterprise-level integration layer between applications while abstracting those applications as services.
通过以上的定义，当提取应用程序作为服务时，SOA是在应用程序之间构建企业级集成层的模式集。
At its most basic level, middleware is nothing but a way of abstracting access to a resource through the use of an Application Programming Interface (API).
在它最基本的层次，中间件只是通过使用应用程序编程接口(Application Programming Interface, API)访问资源的抽象的方法。
Much of the value of models lies in abstracting away details to focus on separated concerns. How much you model depends on what level of abstraction you need to understand.
模型的许多价值存在于抽象的关注个别的关注点。
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