1·They remain in memory until the file is unmounted, a page is stolen, or a file is unlinked.
它们一直都位于内存中，直到文件被卸载、页面被偷取或者取消到文件的链接。
2·This example shows how the current working directory of an application is important, because it still holds a file resource and can prevent a file system from being unmounted.
这个示例说明了应用程序的当前工作目录非常重要，因为它仍保持着文件资源，并且可以防止文件系统被卸载。
3·They remain in memory until the time that the file is unmounted, a page is stolen, or a file is unlinked.
它们一直都位于内存中，直到文件被卸载、页面被替换、或者取消了到文件的链接。
4·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。
5·While the 770 is connected over USB this way, the card is unmounted from the 770, to prevent corruption.
当770以这种方式通过USB进行连接时，这块卡就会从770上卸载，这是为了防止出现数据崩溃的情况。