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