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