undo
undo是什么意思，
undo怎么读
语音:
英音
[ʌn'du:]
美音 [ʌnˈdu]
vt. 松开，解开；取消，废除；毁灭；扰乱
vi. 撤销
【记】un(开)+do(做)→刚开始做，命令就撤销了。
第三人称单数： undoes
过去式： undid
过去分词： undone
现在分词： undoing
易混淆的单词： UNDOUndo
undo 打开
un-, 使相反，do, 做。即把做好的解开，打开。
用作动词(v.)
- 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。
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