Information from E-mail systems, calenders, databases and other data sources is needed on mobile devices for review, update, and processing.

移动设备需要查看、更新和处理来自电子邮件系统、日程表、数据库和其他数据源的信息。

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This issue with concurrency (or multi-threading) is ensuring that threads that you want to update the information with only affect the data and information you are processing.

这种并行性（或多线程）问题在于确保您希望为其更新信息的线程，仅影响正在处理的数据和信息。

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The simplest way to do this is to send an asynchronous update to the server and while that is processing, update the cache and the UI of our application.

完成此操作的最简单方法是向服务器发送异步更新并且在处理期间，更新缓存和应用程序的 UI。

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