キーワード: 即時(shí)通訊_____________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通____________，龍笛即時(shí)通_________________，視頻會(huì)議___________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)________，金笛短信