Twitter 的发明是为了填补公众广播式沟通的空白。
Twitter was invented because there was a gap in public broadcast communication.
通过陆地信号，卫星和电缆，数字式的广播将在可收到的频道的数量上带来一次大爆炸。
Available via terrestrial signals, satellite and cable, digital broadcasting will herald an explosion in the number of available channels.
数字服务也可以是交互式的，允许民意测验和智力竞赛的节目，文字电视广播改良后的译本和照相视角的选择。
The digital services also will be interactive, allowing participation in polls and quiz shows, improved versions of Teletext, and a choice of camera angles on some coverage.
应用推荐