backup音标为英式 ˈbækʌp 美式 ˈbækˌʌp

backup基本含义是支持或备用的人或事物，在计算领域常指数据备份。

短语搭配
数据备份 data backup
备用计划 backup plan
紧急备用 emergency backup
系统备份 system backup
提供备份 provide backup
需要备份 need backup

英文例句带中文翻译
1 Always keep a backup of your important files 请务必备份重要文件
2 The police called for backup during the operation 警方在行动中请求了支援
3 We have a backup generator in case of power failure 我们备有发电机以防停电
4 The team has a strong backup player on the bench 球队替补席上有强大的后备队员
5 Make sure to create a backup before updating the system 更新系统前务必创建备份
6 The project has a backup plan for potential risks 项目针对潜在风险制定了备用计划
7 The backup singer performed perfectly in the concert 伴唱歌手在音乐会中表现完美
8 He serves as a backup to the main coordinator 他是主要协调人的后备人选
9 The backup process completed successfully 备份过程顺利完成
10 Roads have traffic backups during rush hours 高峰时段道路会出现交通堵塞

补充说明
在计算机领域 backup特指为防止数据丢失而进行的复制 日常生活中也可指代替代方案或支援力量 动词形式为back up 需分开书写。