back up 基本解释
17. And at just that moment a little jenny wren, who had hidden in the feathers on his back, flew up----and won the competition.
就在这时，一只藏在他背上羽毛中的小鹪鹩（一种很小的鸟，10厘米长），钻了出来，往高空一飞，赢得了冠军。
18. You should set up separate Administrative, Clerical, Back office, and Support functions.
您应该建立独立的行政、文书、后勤和支持部门。
19. It is imperative that you look at all eventualities and have at least one back up plan.
最重要是，你看看所有不测事件，并有至少一个后备计划。
20. And bending back her head, look'd up
她仰起了头，抬起了眼睛
back up 词典解释
1.
1. 支持，证实（某种说法）
If someone or something backs up a statement, they supply evidence to suggest that it is true.
e.g. Radio signals received from the galaxy's centre back up the black hole theory...
从该星系中心收到的无线电信号证实了黑洞理论。
e.g. Her views are backed up by a 1989 Home Office report on crime.
1989年内政部的一份犯罪报告印证了她的观点。
2. 备份（文件）
If you back up a computer file, you make a copy of it which you can use if the original file is damaged or lost.
e.g. Make a point of backing up your files at regular intervals...
一定要定期备份文件。
e.g. I get so annoyed when I lose work because I've forgotten to back it up.
当我因为忘了备份把完成的工作弄丢时，真是懊恼极了。
3. 将…付诸实施
If an idea or intention is backed up by action, action is taken to support or confirm it.
e.g. The Secretary General says the declaration must now be backed up by concrete and effective actions...
秘书长说现在必须将宣言付诸具体有效的行动。
e.g. It is time the Government backed up its advert campaigns with tougher measures.
是政府采取更严厉的措施来兑现其宣传承诺的时候了。
4. 支持（某人）
If you back someone up, you show your support for them.
e.g. His employers, Norfolk social services, backed him up.
他的雇主??诺福克社会服务中心给予了他支持。
5. 证实（某人）的说法
If you back someone up, you help them by confirming that what they are saying is true.
e.g. The girl denied being there, and the man backed her up.
女孩否认在场，那名男子证实了她的话。
6. 倒车
If you back up, the car or other vehicle that you are driving moves back a short distance.
e.g. Back up, Hans...
倒车，汉斯。
e.g. He backed up a few feet and rolled the window down...
他往后倒了几英尺，然后摇下车窗。
7. back up
7. （车辆）堵塞，排成长龙
If vehicles back up, they form a line of traffic which has to wait before it can move on.
e.g. Traffic into London on the M11 was backed up for several miles.
进入伦敦的车辆在11号高速公路上堵了好几英里。
8. 倒行；退着走；后退
If you back up, you move backwards a short distance.
e.g. I backed up carefully until I felt the wall against my back...
我小心翼翼地后退，直到感觉后背碰到了墙壁。
e.g. She backed up a few steps.
她后退了几步。
9. see also: backup
back up 单语例句
1. I had intended to go back home by car sharing, but eventually I gave up.
2. Visitors can ride a cable car most of the way up the mountainside and rocket back to its base by sled.
3. He hangs up, promising to discuss it with the boss and call back.
4. She wakes up around noon and finds plenty of missed calls on her cell phone from people she needs to call back.
5. The Wallabies victory was soured though by a shoulder injury sustained by utility back Scott Staniforth and may have to call up a replacement.
6. I woke up feeling like I had licked the back of a camel that had spent a week rolling in a salt pit.
7. back up的意思
7. On Saturday protesters swarmed back into Pearl square putting riot police to flight and confidently setting up camp for a protracted stay.
8. Yushchenko's allies sought to persuade thousands of activists to dismantle a tent camp sent up in central Kiev last month to back their candidate.
9. Tourism chiefs in Beijing are gearing up for their most important promotion campaigns ever - enticing visitors back to the capital.
10. Mamani and his neighbors must walk for blocks to two public taps to get water and then carry it back up the hill.
back up 英英释义
verb
1. establish as valid or genuine
e.g. Can you back up your claims?
Synonym: back
2. become or cause to become obstructed
e.g. The leaves clog our drains in the Fall
The water pipe is backed up
Synonym: clog choke off clog up congest choke foul
3.
3. make a copy of (a computer file) especially for storage in another place as a security copy
e.g. You'd better back up these files!
4. move backwards from a certain position
e.g. The bully had to back down
Synonym: back off back down
5. give moral or psychological support, aid, or courage to
e.g. She supported him during the illness
Her children always backed her up
Synonym: support
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