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