1.~ sth打开；解开；拆开to open sth that is fastened, tied or wrapped
to undo a button/knot/zip, etc.解开纽扣、解开绳结、拉开拉锁等
to undo a jacket/shirt, etc.解开上衣、衬衫等
I undid the package and took out the books.我打开包裹取出书来。
2.~ sth消除，取消，废止（某事的影响）to cancel the effect of sth
He undid most of the good work of the previous manager.他把前任经理的大部分功绩都毁掉了。
It's not too late to try and undo some of the damage .想办法补救部分损失还为时不晚。
UNDO(= a command on a computer that cancels the previous action)撤销（计算机的还原指令）
3.[usupass]~ sb/sth打败；挫败to make sb/sth fail
The team was undone by the speed and strength of their opponents.这个队伍被对手的速度和力量打败了。
If the roll forward set has not been rolled forward far enough to be consistent with the database, the undo phase cannot occur.
如果前滚集前滚得不够远，无法与数据库一致，则不会出现撤消阶段。
'A knot! ' said Alice, always ready to make herself useful, and looking anxiously about her. 'Oh, do let me help to undo it! '
“一个结！”爱丽丝说。由于她总是热心帮助别人的，因此就焦急地四周寻找，“哦，让我帮你解开。”
The children began to undo the string round the parcel to see what was in it.
小孩们开始解开那绑着包裹的绳子，看看里而到底是什么东西。
It is up to you and only you to undo the locks and allow yourselves to go forward.
它是在你们的上方而只是你们解开锁而允许你们自己前进。
The position of the heavenly bodies indicates that you may not be able to undo the damage that has occurred within a special relationship.
在一段特殊的感情中，今天的行星暗示了你可能不能挽回所做的伤害。
"If you get this wrong, it's actually a mistake that's hard to undo for the rest of your life, " he said.
所以上大学是个高危投资：“要是你选错了方向，这辈子基本就没什么回头的路了”
"More could lessen or even undo" any benefits, he said, by overloading the muscles' receptors or otherwise skewing the body's response.
如果通过使肌肉的受体超负荷运转，任何对一点对身体的好处就会偏离。
She had spent so much of her life feeling secondary (though to a man she adored) that she burned to undo the laws that hemmed women in.
在她一生的大部分时间中，她总感觉自己作为女性得不到重视（虽然她受到一个男人的宠爱），于是尽自己所能解除那些禁锢女性的法律。
Can have never thought, he incredibly will at the outset to beat to call words, only and by far don't undo the inning of anxiety as well.
可没想到，他居然会率先打来电话，只不过眼下也并非解开心事的好时机。
But at least you know it's available now, so you can add a third button, with the "Undo Current" caption.
但是现在，至少您知道有那么一个选项，这样，您就可以添加第三个按钮，其标题为“UndoCurrent”。
What if he entered some text, edited it, and then decided to Undo the entry of that text but not Undo the editing of it?
如果用户想输入一些文本，编辑文本，接着决定撤销文本的输入。但不撤销对它的编辑，会怎么样？
He couldn't undo his knot in his mind so he began to drink. He was often found sleeping underneath the table.
他无法解开心结，于是他开始喝酒，他被常常发现睡在桌子下面，他的健康逐渐被饮酒削弱。
Researchers found a protein triggered by rheumatoid arthritis could undo the "tangles" in the brain that are thought to cause Alzheimer's.
研究者们发现由类风湿关节炎触发的一种蛋白质可以解开被认为是导致阿尔茨海默氏症的大脑内“缠结”。
Uses the Undo command to reverse the last command or to delete the last entry that you typed.
使用“撤消”命令来撤消上一个命令或删除最后键入的内容。
Pace yourself and don't try to undo ten (twenty, thirty, forty) years of less-than-desirable habits, behaviours and results by next Tuesday.
一步一步走并不要尝试在10年（20年，30年，40年）的时间内松懈自己相对称心的习惯，行为以及下个星期二到来的结果。
It does not allow someone to exhume memories that are decades old or to retrace or undo human development.
它并不能让人挖掘出几十年前的记忆、重新追索或取消人的成长。
NATO troops will not eradicate poppies , out of a reasonable fear that this would undo all their efforts to win local support.
北约部队不会根除鸦片，原因在于，他们担心这么做会使他们赢得当地人支持而做的所有努力化为乌有。
You can use the tag or label to get back to the point where the changes were saved, to undo a change, or to audit a particular change.
可以使用标记或标签返回到变更保存点，以撤销变更，或者审计特定的变更。
Aid agencies already fear that this will undo decades of development efforts in poor parts of the world.
援助机构已经担心，全球贫困地区几十年的发展成果将由此付诸东流。
This article introduces you to the last of these three, an algorithm that can, within certain parameters, undo noise.
本文向您介绍了三者中的最后一个，它是一个只需要特定的参数就可以消除噪声的算法。
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