キーワード: 即時(shí)(shí)通訊________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通____________，龍笛即時(shí)(shí)通________________，移動辦公___________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)