retention
                                                    英 [rɪ'tenʃ(ə)n]
                                                                        美 [rɪ'tɛnʃən]
                        
                
                
                
                
                    
                                    
                
                                                    retention 助记提示
                
                
                    1. re- "back" + tent- + -ion.
2. => hold back, keep back.
3. => continue keeping, keep possession of, keep in the mind.                
                                                                    retention 中文词源
                
                
                    retention 保持,保留,记忆力来自 retain,保持,-ion,名词后缀。引申词义记忆力。
                 
                                                retention 英文词源
                
                
                    
                        - retention (n.)
- late 14c., from Latin retentionem (nominative retentio) "a retaining, a holding back," noun of action from past participle stem of retinere (see retain). Originally medical; mental sense is from late 15c.
 
                
                                                    retention 双语例句
                
                
                    1. He argues strongly for retention of NATO as a guarantee of peace.  他强烈要求保留北大西洋公约组织以维护和平。 来自柯林斯例句
 - 2. They supported the retention of a strong central government. 
- 他们赞成保留一个强大的中央政府。
来自柯林斯例句
 
- 3. The company needs to improve its training and retention of staff. 
- 公司需要改进对员工的培训和留用工作。
来自《权威词典》
 
- 4. They advocate the retention of our nuclear power plants. 
- 他们主张保留我们的核电厂.
来自《简明英汉词典》
 
- 5. RETENTION parameter works best if the current undo tablespace has enough space for the active transactions. 
- retention能做好地工作如果----当前的回滚表空间对活动事务有足够的空间.
来自互联网