キーワード: 即時(shí)通訊__，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通__________________，龍笛即時(shí)通_______，移動(dòng)辦公___________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)