undo
undo是什么意思,
undo怎么讀 
 語(yǔ)音:
              英音 
                            [?n'du:] 
            
            
                
            
                              美音             [?n?du] 
            
            
                
            
vt. 松開,解開;取消,廢除;毀滅;擾亂
vi. 撤銷
【記】un(開)+do(做)→剛開始做,命令就撤銷了。
第三人稱單數(shù): undoes
過(guò)去式: undid
過(guò)去分詞: undone
現(xiàn)在分詞: undoing
易混淆的單詞: UNDOUndo
undo 打開
                            un-, 使相反,do, 做。即把做好的解開,打開。
1. Undo Tablespace:回滾表空間;表空間;撤銷表空間;撤消表空間
2. UNDO SEGMENT:回滾段;撤銷段
3. Undo Send:撤銷發(fā)送;取消發(fā)送;撤銷發(fā)送郵件
4. Undo Information:恢復(fù)信息;撤銷信息;清除回滾段中的恢復(fù)信息
5. UNDO REDO:數(shù)據(jù)庫(kù)備份與恢復(fù)技術(shù);撤消;操作上的
6. Undo Scene Operation:撤消場(chǎng)景操作;撤消場(chǎng)景
用作動(dòng)詞(v.)
- Would you please undo this knot for me?
你能不能幫我把這個(gè)結(jié)解開? - He tried to undo the knot by picking at it with his fingers.
他用手指不停地扯,想把繩結(jié)解開。 - To return a database to its state as of the last committed change, i.e., to undo recent uncommitted changes.
使一個(gè)數(shù)據(jù)庫(kù)返回到它上次已確認(rèn)的改變之后的狀態(tài),即取消最近的尚未確認(rèn)的變動(dòng)。 - A compensating transaction means that a new transaction will undo the effects of previous transactions.
補(bǔ)償事務(wù)的意思是一個(gè)新事物會(huì)用于取消前一個(gè)事務(wù)的所有效果。 
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