最后，该SupportPac包含两个极为有用的实用工具程序。

Finally, the SupportPac contains two utility programs that can be quite helpful.

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按这种方式组合Web服务，您可以快速地使用大量实用工具程序来构建应用程序。

By composing web services in this way, you can quickly build applications of tremendous utility.

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每一份套件均包含了完整的麻省理工开放式课程网站的复制及与一个装有实用工具程序与教材的外接式硬碟。

Each package includes a complete copy of the MIT OCW site as well as supplementary tools and materials provided on an external hard drive.

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