backup ['bækʌp] 名词
微软	dublējums (A duplicate of a program, a disk, or data, made either for archiving purposes or for safeguarding files)
英语 词库
Backup ['bækʌp] 缩写
缩写, 文件扩展名	.bak (file name extension); .bk! (file name extension, WordPerfect); .xlk (file name extension, Microsoft-Excel)
backup ['bækʌp] 动词
信息技术	Files, equipment, data and procedures available for use in the event of a failure or loss, if the originals are destroyed or out of service
缩写, 大规模杀伤性武器	back.

Backup : 23 短语, 2 学科

信息技术	6
微软	17