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