1、Commands are used to perform all of the user's undoable changes.
命令用于執(zhí)行用戶的所有可撤銷的更改。

2、Because specifying undoable operations is such a common need, the syntax becomes important.
因為指定可撤銷的操作是一個常見需求，所以這個語法變得很重要。

3、Enables the ability to undo actions that occur within undoable action units or transactions.
啟用撤消在無法撤消的操作單元或事務內發(fā)生的操作的能力。

4、The worst confirmations are those of undoable actions, such as moving a file to the Recycle Bin.
最壞的確認過程是那些可恢復的操作，例如移動文件到回收站中。

5、Making this function undoable would also be relatively easy to implement and highly desirable.
讓該功能本身也可以撤銷，這樣會相對容易實現(xiàn)，也會更加理想。

6、As a result, the undo engine has control over the duration of an undoable action.
因此，復原引擎能控制可復原動作的持續(xù)期間。

7、An undo unit represents a single unit of undoable work.
復原單位表示一個可復原工作的單位。