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.

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。

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The application USES the database, both are running in the same JVM, and the database stores the data on the local file system.

应用程序使用数据库，二者在同一个JVM中运行，而数据库把数据保存在本地文件系统中。

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To improve performance, JCS stores the cached data keys in memory while storing the actual cached data on the file disk.

为了提高性能，JCS在文件磁盘上存储实际缓存数据的同时，会在内存中存储缓存数据键。

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There is no U.S. law, as there is in Europe, requiring companies to allow people to view or delete their personal data on file at an institution.

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The device allows simultaneous data access and file sharing for up to three users on their preferred mobile device.

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Most working mothers return to work within a year of having a child, according to the 2009 report, "Opting-Out: An Exploration of Labor Force Participation of New Mothers, " based on the American Community Survey three-year data file for 2005-2007.

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