キーワード: 即時(shí)通訊________________________，企業(yè)(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)(fā)________________，金笛短信