实际上，在执行 Begin backup后，接下来应该立刻执行系统复制，然后由 End backup 来快速结束操作。
Practically it means when Begin backup is issued, an operating system copy should follow, and then quickly end by an End backup.
这不是一个过程，你开始，然后坐下来，它便会神奇复制自身。
It is not a process that you begin and then sit back and it magically replicates itself.
接下来我复制了纹理，然后旋转它来和第二级网格一致。
I next duplicated the texture and rotated to match the second grid system.
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