duplicate copy

基本解释

This way, new hardware is introduced into the environment only as a duplicate copy of the other machines.
这样，可以将新硬件仅作为其他计算机的副本引入环境。
Using the slice syntax, without specifying a starting or ending index, you can make a duplicate copy of an existing tuple.
使用片段语法，无需指定开始或结束索引，就可以制作现有 tuple 的副本。
so you can have a duplicate copy of the same filesystem. When you run xm create -c test, it runs the same server as the BaseServer, but it's called TestServer.
当运行 xm create -c test 时，它会运行与 BaseServer 相同的服务器，但是它的名称是 TestServer。