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驾车的朋友深有体会,有了卫星导航系统,去哪里都不用愁。 Alice: Hello, I'm Alice. Stephen: And I'm Stephen. Alice: And this is 6 Minute English! This week were talking about sat navs. Stephen: Sat navs thats short for satelli
DAMA - Stands for Demand-Assigned Multiple Access. This is a way to instantaneously assign telephony channels in a transponder according to the immediate traffic demands. Dash - This is the the charac
DCE data circuit terminating equipment DCP digital communications protocol DCS digital cross-connect system DDD direct distance dialing DDN Defense Data Network Digit L Digital L is another amplitude
D type Channel Bank A D type channel bank is channel termination equipment used for combining (multiplexing) individual analog channel signals on a time division basis. D type channel banks provide in
China has once again emphasised its support for the freedom of navigation in the South China Sea, but is opposed to wanton navigation in the region. A Chinese military official made the remarks in Vientiane following the defense ministers meeting wit