undo
/ʌnˈduː/📚 6732 49 1四级六级考研托福雅思高考If you undo something that is closed, tied, or held together, or if you undo the thing holding it, you loosen or remove the thing holding it. 打开; 解开; 松开
verb [vt. 及物动词]解开，松开；消除…影响或结果，使恢复原状；撤销（先前的计算机指令）；破坏，毁掉
To undo something that has been done means to reverse its effect.
使无效• A heavy-handed approach from the police could undo that good impression. 警察的专制手段能使那个好印象化为乌有。
noun [抽象名词]（计算机）撤消还原
Undo has some exceptions.
撤销有一些例外情况。
单词造句: