虽然你的个人电脑只能保存一个文件的一个副本，但像 Facebook 这样的大型服务项目，则会依赖于所谓的内容分发网络来管理数据和分发。

While your personal computer only keeps one copy of a file, large-scale services like Facebook rely on what are called content delivery networks to manage data and distribution.

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订单管理组件服务项目负责将总体COATS系统转换为实时的订单提交系统。

The order Management Component Services project is transforming the overall COATS system to a real-time order submission system.

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该公告称，具体服务项目包括项目管理，项目规划和分析，电信工程，系统集成，以及修理和改装。

Specific services covered include project management, program planning and analysis, telecommunications engineering, systems integration, and repair and modification, the announcement states.

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