短語詞組短語archive retention grace period 歸檔保留寬限期retention n period 保管期限backup retention grace period 份保留寬限期distribution retention period 分發(fā)保持期;散發(fā)保留周期file retention period [計(jì)]文件保留期;文件保存期additional retention period 附加保留期間retention period check 保持期間核對(duì);翻譯mount retention period 保留期Historical data retention period 歷史數(shù)據(jù)保留期限 返回 retention period