undo的词语用法是：v.(动词)undo指将原本捆绑着的东西打开,如鞋带、包裹等,即“松开,解开”,主要强调解开的动作,而不强调解开的状态。引申可指“毁坏,败坏”。undo【近义词】untie解开。undo的读音是英[ʌn'duː]；美[ʌn'duː]。
一、详尽释义点此查看undo的详细内容
二、双解释义
三、词典解释
1.解开；松开；打开
If youundo something that is closed, tied, or held together, or if youundo the thing holding it, you loosen or remove the thing holding it.
e.g. I managed secretly toundo a corner of the parcel...
我悄悄地设法解开了包裹的一角。
e.g. I undid the bottom two buttons of my yellow and grey shirt...
我解开了自己黄灰相间的衬衫上最下面的两个纽扣。
2.撤销；抵消；消除
Toundo something that has been done means to reverse its effect.
undo的近义词
e.g. A heavy-handed approach from the police couldundo that good impression...
警方采取高压手段可能会毁掉之前留下的好印象。
e.g. She knew it would be difficult toundo the damage that had been done...
她知道想要消除已经造成的损害是很难的。
3.破坏；毁掉
If a person, organization, or planis undone by something, that thing causes their failure.
undo什么意思
e.g. They were undone by a goal from John Barnes...
约翰·巴恩斯的一粒进球使他们落败。
e.g. Macbeth is the story of a Scottish soldier who becomes king but is undone by his own ambition.
《麦克白》讲述的是一个苏格兰士兵当上了国王，却毁于自己的野心。
4. see also: undoing;undone
四、例句
Would you please undo this knot for me?
你能不能帮我把这个结解开？
He tried to undo the knot by picking at it with his fingers.
他用手指不停地扯，想把绳结解开。
To return a database to its state as of the last committed change, i.e., to undo recent uncommitted changes.
使一个数据库返回到它上次已确认的改变之后的状态，即取消最近的尚未确认的变动。
A compensating transaction means that a new transaction will undo the effects of previous transactions.
补偿事务的意思是一个新事物会用于取消前一个事务的所有效果。
五、词汇搭配
六、经典引文
She undid the gate, and held it half open.
出自：L. ParrMarcus..undid Patrick's pyjama jacket and started to pull it off.
出自：I. Murdoch七、词语用法
undo的相关近义词
untie、unfasten、loosen、unwrap、disassemble、dismantle、unbutton、disengage、open、unknot、unravel、cancel out、negate、cancel、nullify、invalidate、reverse、work against、unlock、doff、annul、apart、take、take apart、abolish、wreck、destroy、spoil、counterbalance、unmake
undo的相关临近词
undoubted、undesirable、undor、UNDOF、undog、undone、undose、undoer、undope、undock、undosus、undoing