Source control allows you to "roll back" to a previous iteration of a file to restore the status quo or to recover from an error.
源代码控制系统允许用户“回滚”到以前的文件版本，从而恢复以前的状态或从错误中恢复。
The original file system must be unmounted before executing the roll back.
在执行回滚之前，必须卸载原始文件系统。
The first thing you need to do in getting Quick ready to roll is create a QDML file.
您需要让Quick准备做的第一件事情是创建QDML文件。
Using WebSphere Application Server Version 6.X, you can configure an application server's log file to "roll over" at certain intervals.
通过使用WebSphereApplicationServerVersion 6.X，您可以将应用服务器的日志文件配置为按特定的间隔进行“结转 (roll over)”。
The letter “C” in the acronym stands for cascading, meaning you can apply styles in one file and import or roll over newer properties in a later file.
首字母C代表cascading——一种由上至下的时间倒叙展示方式，其中，最近更新的文件位于页面顶端，这样，你便能以最简洁的页面形式浏览文件，然后接入或浏览新媒介上的更新文件。
Explains how to determine if a file exists on a target computer and roll back installation if it does not.
描述如何确定目标计算机上是否存在某个文件。
You can save the current state of the file before the user changes it and then roll back to that at a later point.
你可以在用户改变文件之前保存当前的状态，之后可以进行恢复。
You can save the current state of the file before the user changes it and then roll back to that at a later point.
你可以在用户改变文件之前保存当前的状态，之后可以进行恢复。
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