The Undo option in AIXPert (aixpert -u) reverses the security changes made using AIXPert, but there are a few actions that you can't undo.

AIXPert 中的 Undo 选项 (aixpert -u) 可以撤销使用 AIXPert 做的安全更改，但是有几种操作不能撤销。

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'Unclogging the credit markets is a necessary first step, but the damage done to the U. S. and foreign economies thus far will take time to undo,' he said.

他表示，解冻信贷市场是必要的第一步，但美国和全球经济已经蒙受的创伤还需要时间去弥合。

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Pressing ALT-U brings up the Undo Menu (Undo Menu).

按ALT-U弹出撤消菜单（撤消菜单）。

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No nation will make concessions if it knows the U.S. Congress is able to pass amendments that may undo U.S. concessions.

FORBES: Golden Times--Even If We Don't Know It

The stepped-up violence comes amid efforts by several Sunni groups including loyalists of former president Saddam Hussein to bring down the Shiite-led government in Baghdad and undo the political process ushered in after the U.S.-led invasion.

WSJ: Wave of Deadly Attacks Hits Baghdad

The latest violence comes amid efforts by several Sunni groups, including Saddam loyalists, to bring down the Shiite-led government in Baghdad and undo the political process that was ushered in after the U.S.-led invasion.

WSJ: Wave of Deadly Attacks Hits Baghdad