为了检查获取状态，这个子过程周期性地获取后台文档。
In order to check on the retrieval status, the sub retrieves the back-end document periodically.
第一个特性是一个可视化标志，使用户知道对特定文档的获取操作仍然在后台执行，但是还没有完成。
The first feature is a visual indicator to the user that the retrieval for a specific document is continuing in the background, but has not yet finished.
RMC在后台创建和管理HTML——它提供了格式良好的，带有超链接的文档，如你在图4中所见（显示了一个任务的文档的预览）。
RMC creates and manages the HTML behind the scenes that provides the well-formatted and hyperlinked documentation that you saw in Figure 4 (showing a preview of page documenting a task).
借助于自动生成文档的类库的后台工作，只需要在每个.as文件中添加几行简单的代码就能实例化整个框架。
The entire framework is instantiated in just a few lines of code per .as file thanks to the document classes doing all of the connection work in the background.
一个后台线程可能会每隔几秒读取一次该传感器，并更新包含当前文档的volatile变量。
A background thread might read this sensor every few seconds and update a volatile variable containing the current temperature.
例如，假定有一个构建文档的脚本，它在后台使用Apache的格式化对象处理器(Formatting Objects Processor,FOP)系统生成文档的PDF版本。
For example, say you have a script that builds a document in the background using the Formatting Objects Processor (FOP) system from Apache to generate a PDF version of the document.
打印的实际上是后台导出到PDF，因此实际上是后台生成的PDF文档被发送到打印机，而非网页显示的内容。
The printing is based on behind-the-scenes export to PDF so it is the generated PDF document that is actually sent to the printer.
xml文档为ejb3实体bean配置了后台数据源。
The persistence.xml file configures the backend database source for the EJB3 entity beans.
面向文档审批的可视化工作流系统由审批流建模、引擎和监视器，及客户端程序、后台应用等组成。
The visual workflow system based on approving of object-oriented document is composed of workflow modeling, workflow engine and monitor, client and background application.
如何：允许代码在具有受限制权限的文档的后台运行。
How to: Permit Code to Run Behind Documents with Restricted Permissions.
如何：允许代码在具有受限制权限的文档的后台运行。
How to: Permit Code to Run Behind Documents with Restricted Permissions.
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