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。
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 operations are allowed.
允许无限制的重复和取消操作。
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。
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。
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。
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。
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