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______，集成開發(fā)(fā)(fā)(fā)(fā)(fā)______，金笛短信