キーワード: 即時(shí)通訊________，企業(yè)(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)(fā)____________________________，金笛短信