undo
['ʌn'du:]
v. 解开, 松开, 取消
例句与用法：
The knot was fastened in such a way that it was impossible to undo.
这个结系得那么紧,根本解不开。
He undid most of the good work of his predecessor.
他把前任的大部分业绩毁掉了。
That mistake has undone all our good work.
那个过错使我们前功尽弃。
It's better for the doer to undo what he has done.
解铃还需系铃人。
Our folly has undone us.
我们的愚蠢行为将自己毁了。
词形变化：
名词: undoer | 动词过去式: undid | 动词过去分词: undone | 动词现在分词: undoing | 动词第三人称单数: undoes |
详细释义：
vt.
1. 解开, 打开; 使松开; 脱去(衣服等)
He undid the parcel.
他打开了包裹。
2. 取消, 消除; 使失败; 使复旧
What's done cannot be undone.
覆水难收。
3. 破坏, 败坏(成果、名誉等); 毁灭[H]
He has undone the good work of his predecessor.
他已毁了他前任取得的良好成就。
4. 扰乱, 使不安