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back up
1 PHRASAL VERB 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. 支持,证实(某种说法) [Also VERB n PREPOSITION]
  • Radio signals received from the galaxy's centre back up the black hole theory. [VERB PREP. noun]

    从该星系中心收到的无线电信号证实了黑洞理论。

  • Her views are backed up by a 1989 Home Office report on crime. [VERB PREP. noun (not pronoun)]

    1989年内政部的一份犯罪报告印证了她的观点。

2 PHRASAL VERB 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. 备份(文件) [computing]
  • Make a point of backing up your files at regular intervals. [VERB PREP. noun]

    一定要定期备份文件。

  • I get so annoyed when I lose work because I've forgotten to back it up. [VERB noun PREP.]

    当我因为忘了备份把完成的工作弄丢时,真是懊恼极了。

3 PHRASAL VERB 付诸实施 If an idea or intention is backed up by action, action is taken to support or confirm it. 付诸实施 [Also VERB n PREPOSITION]
  • The Secretary General says the declaration must now be backed up by concrete and effective actions. [be VERB-ed PREP.]

    秘书长说现在必须将宣言付诸具体有效的行动。

  • It is time the Government backed up its advert campaigns with tougher measures. [VERB PREP. noun]

    是政府采取更严厉的措施来兑现其宣传承诺的时候了。

4 PHRASAL VERB 支持(某人) If you back someone up, you show your support for them. 支持(某人) [Also VERB PREPOSITION n]
  • His employers, Norfolk social services, backed him up. [VERB noun PREP.]

    他的雇主诺福克社会服务中心给予了他支持。

5 PHRASAL VERB 证实(某人)的说法 If you back someone up, you help them by confirming that what they are saying is true. 证实(某人)的说法 [Also VERB PREPOSITION n]
  • The girl denied being there, and the man backed her up. [VERB noun PREP.]

    女孩否认在场,那名男子证实了她的话。

6 PHRASAL VERB 倒车 If you back up, the car or other vehicle that you are driving moves back a short distance. 倒车
  • Back up, Hans. [VERB PREP.]

    倒车,汉斯。

  • He backed up a few feet and rolled the window down. [VERB PREP.]

    他往后倒了几英尺,然后摇下车窗。

  • A police van drove through the protesters and backed up to the front door of the house. [VERB PREP. + to]

    一辆警车穿过抗议的人群,并倒至房子的前门。

7 PHRASAL VERB (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. (车辆)堵塞,排成长龙
  • Traffic into London on the M11 was backed up for several miles. [be VERB-ed PREP.]

    进入伦敦的车辆在11号高速公路上堵了好几英里。

8 PHRASAL VERB 倒行;退着走;后退 If you back up, you move backwards a short distance. 倒行;退着走;后退
  • I backed up carefully until I felt the wall against my back. [VERB PREP.]

    我小心翼翼地后退,直到感觉后背碰到了墙壁。

  • She backed up a few steps. [V P amount]

    她后退了几步。

9 See also: backup 
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See also: back up

back up phrasal verb
confirm2

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