Mot-clefs : 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(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)________，金笛短信