其显示效果是应用了一个样式来表明此节点已经删除(红色的删除线)，而undo菜单项现在对此节点是启用的。
The visual actions that occur are that a style is applied to indicate the node has been removed (red strikethrough), and the undo menu item is now enabled for this node.
其显示效果是应用了一个样式来表明此节点已经删除(红色的删除线)，而undo菜单项现在对此节点是启用的。
The visual actions that occur are that a style is applied to indicate the node has been removed (red strikethrough), and the undo menu item is now enabled for this node.
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