You cannot undo or redo a folder action while the folder is loading.
在装入文件夹期间无法复原或重做一个文件夹操作。
You can tell it to undo or redo actions, but you can't inspect those actions or selectively save data in the current undo stack.
您可以让它撤消或重做动作，但您无法检查这些动作或选择性地将数据保存在当前的撤消堆栈中。
Users initiate an undo by shaking the device, which displays an alert that allows users to undo what they just typed, redo previously undone typing, or cancel the undo.
用户摇晃设备启动撤销，接着设备将显示警告，允许用户撤销他们刚刚输入的内容，重做之前撤销的内容，或取消撤销。
In effect, toggling between Undo and Redo implements a comparison or what-if? Function; it just happens to be represented in the form of its implementation model.
在效果上，在撤销和恢复之间进行切换实现了比较或“如果这样将会怎样”的功能，它正好以实现模型的形式表达。
In effect, toggling between Undo and Redo implements a comparison or what-if? Function; it just happens to be represented in the form of its implementation model.
在效果上，在撤销和恢复之间进行切换实现了比较或“如果这样将会怎样”的功能，它正好以实现模型的形式表达。
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