谁知道AD,DDD,BC,CAAC,NAB这些英文缩写的意思啊,

AD= Access Device,存取设备= Address Decoder,地址译码器= Alternate Display,备用显示器= Analysis/Design,分析/设计= Automated Design,自动设计= Automatic cash Depositor,自动存款机= Automatic Display,自动显示ADabbr。公元 (Anno Domini)DDD= Data Dictionary/Directory,数据字典目录= Detailed Data Display,详细数据显示= Digital Data Distributor,数字数据分配器= Digital Display Detection,数字显示检测= Digital Display Driver,数字显示驱动器[程序]DDD[ 9di:9di:`di:][计] 数据字典目录长途直拨(电话)BC= Basic Control mode,基本控制方式= Binary Code,二进制(代)码= Binary Counter,二进制计数器= Bit Clock (3704),比特时钟= Board of Control,控制板,控制盘= Branch Concentrator,【PFA】分行集线器[集中处理 机]BCn。公元前CAAC =Civil Aviation Administration of China (现译名为:General Administration of Civil Aviation of China) 中国民用航空管理总局,中国民航局NAB= network address block,网络地址块= Network Address Block,网络地址块