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