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(huì)議_________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)__________，金笛短信