The word 'backup' is a noun referring to support or an obstruction, and an adjective meaning spare or reserve.
单词 'backup' 是一个名词，指支持、后援或阻塞；形容词表示备用的。
| 单词 | backup |
|---|---|
| 音标 | [ˈbækʌp] [ˈbækˌʌp] |
| 释义 | n.["支持，后援","阻塞","<计>备份文件","[乐]伴奏"] adj.["备用的，后补的","支持性的","伴奏的"] |
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