| 词汇 | back up |
| 释义 | back upsee ⇨ back 2,3 ⇨ copy 1 ⇨ prove 1 back upphr v 1. [t back sb/sth ↔ up] to support what someone is doing or saying, or show that it is true 支持［某人做的事或说的话］; 证实［某事］:◇he had evidence on video to back up his claim. 他有录像证据来证实他的说法。 2. [i,t back sth ↔ up] to make a copy of information on a computer ［在电脑上］复制（资料） 3. [i,t back sth ↔ up] to make a car go backwards 倒（车） |
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