| 短语 | back up |
| 释义 | back up 1. back sb / sth ↔ up to say or show that what someone is saying is true证实某人的说法，为某人作证; 验证某事:•Jane would back me up if she were here.简要是在这儿，她可以为我作证。•There's no evidence to back up his accusations.没有证据可以证明他的指控。•These theories have not been backed up by research.这些理论尚未通过调查验证。2. back sb / sth ↔ up to provide support or help for someone or something支持（帮助）某人/某事:•The plan's success depends on how vigorously the UN will back it up with action.这个计划成功与否，有赖于联合国是否会积极采取行动加以支持。•The police officers are backed up by extra teams of people at the weekend.到了周末，警察得到了增派人员的支援。⇒BACKUP3. to make a copy of information stored on a computer复制（磁盘），备份:•Make sure you back up.你一定要做好备份。back sth ↔ up •These devices can back up the whole system.这些设备可以为整个系统备份。back sth ↔ up onto sth •Back all your files up onto floppy disks.把你所有的文件都复制到软盘上去。⇒BACKUP4. especially AmEto make a vehicle move backwards倒（车）:•The truck stopped and then backed up.卡车停下来，然后倒车。back sth ↔ up •I backed the car up a little.我把汽车往后倒了一点。5. to move backwards向后移动，往后退:•Back up a bit so that everyone can see.往后点儿让大家都能看得见。⇒BACKUP6. if traffic backs up, it forms a long line of vehicles that cannot move〔车辆〕排起长队，积压:•The traffic was starting to back up in both directions.两边的车辆都开始排起了长龙。7. if a toilet, sink etc backs up, it becomes blocked so that water cannot flow out of it〔马桶、洗涤池等〕堵塞 back up 1. (of vehicles) form into a queue due to congestion （车辆）堵塞： the traffic began to back up. 交通开始堵塞。 2. (of running water) accumulate behind an obstruction （流水）积聚。 ˌback ˈup|ˌback sth↔ˈupto move backwards, especially in a vehicle后退；倒（车）You can back up another two feet or so.你可以再退两英尺左右。I backed the car up to the door.我把车倒到门前。back up1. drive or move backwards 倒车 * He had to back his car up because the mountain path was too narrow. 由于山路太窄，他不得不把车子倒了回来。2. support 支持 * I hope you will back me up in this argument. 我希望在这场争论中你能支持我。 * Nobody backed her up when she protested against the decision. 当她反对这项决定时，没人支持她。3. block; hold up 阻塞 * The vehicles were backed up because of the accident. 车辆因交通事故受阻了。back up支持;为……撑腰：That student has applied for a scholarship，whether he can succeed is still in the air，for only few teachers back him up.那个学生已经申请了奖学金，他能否成功尚未一定，因为只有很少的老师支持他。 |
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