英语词汇backup retention怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	backup retention
释义	backup — 奥援 retention n — 保留 n • 留用 n retention — 滞留
随便看	elective program electives' electives' electives elective Section electives focus electives office elective subject elective subjects elective surgeries elective surgery elective training elective treatment elect leader elect leadership elect member elect new officers elect not to elector electoral electoral Act Electoral Act electoral activities electoral Administration electoral Administration

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

backup —