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