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_________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_______________，金笛短信