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