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(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)___________________，金笛短信