キーワード: 即時(shí)通訊_____________________，企業(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)________________，金笛短信