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