v. cancel, annul, or reverse an action or its effect
v. cause the ruin or downfall of
vt. 解开, 取消, 破坏, 毁灭, 扰乱
vi. 松开
[计] 撤消
1. I accidentally deleted the file, but I can undo the action.
我不小心删除了文件，但我可以撤销这个操作。
2. If you make a mistake while typing, just press "Ctrl + Z" to undo it.
如果你在打字时犯了错误，只需按“Ctrl + Z”来撤销。
3. She wanted to undo her last decision and try a different approach.
她想撤销她的最后决定，尝试另一种方法。