One user in the system can have multiple files.
系统中的一个用户可以具有多个文件。
Another way to define it is, virtualization allows the user to run multiple applications in an existing operating system.
另一种定义方法是，虚拟化让用户可以在一个现有的操作系统中运行多个应用程序。
This process repeats itself as the user navigates the application and also occurs in parallel as multiple people access the system.
当用户在应用程序中导航时，这个过程重复进行；当多个用户访问系统时，这个过程会并发进行。
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