キーワード: 即時(shí)(shí)通訊_______，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通___________________，龍笛即時(shí)(shí)通___________，視頻會(huì)議_________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)________，金笛短信