| 单词 | backup |
| 释义 | backup n. 1. moral or technical support (called for extra backup). 2. a reserve. 3. Computing (often attrib.) a the procedure for making security copies of data (backup facilities). b the copy itself (made a backup). 4. US a queue of vehicles etc., esp. in congested traffic. Phrases and idioms backup light US a reversing light. |
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