It is an illusion because building quality software is essentially complex, but abstracting this complexity is the challenge that cloud startups like CallFire meet.
说是假象是因为优质的软件其建设基本上都是复杂的，但抽象化这种复杂性正是像CallFire这样的初创企业所面临的挑战。
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。
Virtual experimental teaching software simulates physical experiment by abstracting kinds of instrument, building virtual scenes and realizing EDA.
虚拟实验教学软件从真实实验中抽象出各种元器件，组建虚拟场景，实现电子设计自动化(EDA)。
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