英语词汇“back (sth) up”的读音、翻译、释义、用法及例句-出国留学网

词汇	back (sth) up
释义	back (sth) up to move backwards, especially in a vehicle 后退；倒退；倒（车）: Back up a little so that the other cars can get past. 把车往后倒一点，那样别的车辆就可以过去。
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