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