キーワード: 即時(shí)(shí)(shí)通訊______________，企業(yè)(yè)(yè)(yè)溝通____，龍笛即時(shí)(shí)(shí)通_，視頻會(huì)(huì)議________，集成開發(fā)(fā)(fā)(fā)_______，金笛短信