At the heart of this magic is the ability to undo and redo.
这个魔法的中心是撤销和重做的能力。
During the course of editing, undo, and redo, the model is the only thing that endures.
在编辑、撤销和重做的过程中，模型是唯一保持不变的。
Commands can be used to validate the user's interaction, and to provide undo and redo support.
命令可用来验证用户的交互，并且提供撤销和重做支持。
Unlimited undo and redo for edit operations
对于编辑操作的无限制撤销和还原
Quicksheet has 125 functions. It also does formatting of cells well, and has undo and redo.
Quicksheet有125种功能，也可以很好地调节表格的版式，有撤消和恢复操作的功能。
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。
The familiarity of undo, redo, copy and paste have changed the way we live as well as the value we place on content and creation itself.
我们对撤销、还原、复制、粘贴了如指掌，它们改变了我们的生活方式以及创作和内容本身的价值。
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。
The shake gesture is the primary way users expect to initiate undo and redo, but you can also include the system-provided Undo and Redo buttons in a navigation bar, if appropriate.
摇晃是用户期望启动撤消和重做的首要方法，但如果可以的话，你也可以在导航栏中包含系统提供的撤消和重做按钮。
Unlimited undo and redo operations are allowed.
允许无限制的重复和取消操作。
When used as comparison functions, Undo and Redo are really one function and not two.
在使用比较功能时，撤销和恢复实际上是一个功能，而不是两个。
You can reverse the action of the Undo command by using the Redo command.
你可以使用重做命令来扭转撤销命令进行的操作。
You can reverse the action of the Undo command by using the Redo command.
你可以使用重做命令来扭转撤销命令进行的操作。
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