基本解释拨号备份英汉例句双语例句The Sequencing or Line Replenishment Operator shall provide a phone extension to be used for dial backup of the primary data communications link.排序或线路补给操作员应提供一个电话分机，以便联系主要数据通讯联接的后援。www.1x1y.com.cndial backup更多例句词组短语短语dial backup auto answer unit 拨号备援自动回答装置asynchronous dial -up backup 异步拨号备份dial backup更多词组