キーワード: 即時(shí)(shí)通訊______________，企業(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)______，金笛短信