キーワード: 即時(shí)(shí)通訊______________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通___________，龍笛即時(shí)(shí)通__________，視頻會(huì)議_______________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_________，金笛短信