Schlüsselwort: 即時(shí)通訊__________，企業(yè)(yè)(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)(fā)(fā)___________________，金笛短信