For example, system designers could create an internal interface package to utilize third-party billing code but only expose interfaces to those packages that use the billing code.

例如，系统设计师可以创建一个内部接口包来利用第三方记帐代码，但是只对这些使用记帐代码的包公开接口。

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The billing service establishes the connection to the web server through a PHP interface and gets the record document from the Usage record (UR) Repository.

这个账单服务通过一个PHP接口连接web服务器，从使用量记录(UR)存储库获取记录文档。

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The billing system may also provide subscriber interface components that would be integrated into an end user portal.

计费系统还可以提供订户接口组件，这些组件将被集成到最终用户门户网站中。

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It is essentially a closed platform, which makes it challenging and costly for hospitals to interface Epic with clinical or billing software from other companies for the purpose of merging patient information.

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According to TechCrunch, buying TokBox added new services that Telefonica could offer developers through its BlueVia Application Programming Interface (API) platform: these already included voice, messaging and billing APIs when the TokBox deal closed.

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