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_______，視頻會議_______________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)____________________，金笛短信