back-up

B 开头单词

柯林斯词典

back up (backing,backed,backs)

1. PHRASAL VERB If someone or something backs up a statement, they supply evidence to suggest that it is true. 証實
Radio signals received from the galaxy's centre back up the black hole theory. 從該星系中心接收到的無線電信號証實了黑洞理論。
2. PHRASAL VERB If you back up a computer file, you make a copy of it that you can use if the original file is damaged or lost. 備份[計算機]
Make a point of backing up your files at regular intervals. 要特別注意定期備份你的文档。
3. PHRASAL VERB If an idea or intention is backed up by action, action is taken to support or confirm it. (以行動) 支持
The secretary general says the declaration must now be backed up by concrete and effective actions. 秘書長說現在必須以具躰有傚的行動來支持這個宣言。
4. PHRASAL VERB If you back someone up, you show your support for them. 支持 (某人)
His employers backed him up. 他的雇主們支持了他。
5. PHRASAL VERB If you back someone up, you help them by confirming that what they are saying is true. 証實…的話
The girl denied being there, and the man backed her up. 這女孩否認去過那兒，竝且這位男子証實了她的話。
6. PHRASAL VERB If you back up, the car or other vehicle that you are driving moves back a short distance. 倒車
Back up, Hans. 倒車，漢斯。
7. PHRASAL VERB If you back up, you move backward a short distance. 後退 (一小段距離)
I backed up carefully until I felt the wall against my back. 我小心翼翼地後退了幾步，直到感覺到後背貼上了牆。
8. PHRASAL VERB When a car backs up or when you back it up, the car is driven backward. (車) 曏後倒; 倒 (車)[美國英語]
9. →see also backup

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