| 单词 | back up |
| 释义 | back up 1. phrasal verb B2 If someone or something backs up a statement, they supply evidence to suggest that it is true. Radio signals received from the galaxy's centre back up the black hole theory. [VERB PARTICLE noun] Her views are backed up by a Home Office report on crime. [VERB PARTICLE noun (not pronoun)] 2. phrasal verb B2 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. [computing] Make a point of backing up your files at regular intervals. [VERB PARTICLE noun] I get so annoyed when I lose work because I've forgotten to back it up. [VERB noun PARTICLE] 3. phrasal verb If an idea or intention is backed up by action, action is taken to support or confirm it. The Secretary General says the declaration must now be backed up by concrete and effective actions. [be VERB-ed PARTICLE] It is time the Government backed up its advert campaigns with tougher measures. [VERB PARTICLE noun] 4. phrasal verb B2 If you back someone up, you show your support for them. His employers, Norfolk Social Services, backed him up. [VERB noun PARTICLE] 5. phrasal verb B2 If you back someone up, you help them by confirming that what they are saying is true. The girl denied being there, and the man backed her up. [VERB noun PARTICLE] 6. phrasal verb If you back up, the car or other vehicle that you are driving moves back a short distance. Back up, Hans. [VERB PARTICLE] He backed up a few feet and rolled the window down. [VERB PARTICLE] A police van drove through the protesters and backed up to the front door of the house. [VERB PARTICLE + to] 7. phrasal verb If vehicles back up, they form a line of traffic which has to wait before it can move on. Traffic into London on the M11 was backed up for several miles. [be VERB-ed PARTICLE] 8. phrasal verb If you back up, you move backwards a short distance. I backed up carefully until I felt the wall against my back. [VERB PARTICLE] She backed up a few steps. [V P amount] 9. See also backup See full dictionary entry for back Translations: Chinese: 支持 Japanese: 支援する |
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