业务操作是围绕一组服务设计的，而这要求对当前IT系统进行再工程，并将其作为服务提供者加以集成。

Business operations are designed around a set of services that require current IT systems to be re-engineered and integrated as service providers.

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第 4 部分对原始应用程序进行转换，使其能够作为 Web 服务进行访问，并且它为 PHP 接口提供了基础。

Part 4 converts the original application into one that can be accessed as a Web service, and it provides the base for the PHP interface.

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第4部分对原始应用程序进行转换，使其能够作为Web服务进行访问，并且它为PHP接口提供了基础。

Part 4 converts our original application into one that can be accessed as a Web service, and provides the base for the PHP interface.

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