管理学 电子政务网络技术 释 integrated services digital network; ISDN 综合业务数字网 实现话音、数据和图像在同一个网络中传输与交换的重要技术，是一种典型的电路交换网络系统。
网络与数据通信 协议体系与组成结构 释文 integrated service digital network, ISDN 综合业务数字网
- glacial advance
- glacial chronology
- glacial depositional system
- glacial deposits
- glacial drift
- glacial erratic
- glacial fluvial facies
- glacial geomorphic landscape
- glacial-interglacial cycles
- glacial isostatic adjustment
- glacialization
- glacial lake
- glacial lake outburst flood
- glacial landform
- glacial meltwater runoff
- glacial microbe
- glacial period
- glacial record
- glacial refuge
- glacial relic
- glacial seasonal varve
- glacial slide
- glacial termination
- glacial till
- glacial varve