Palavra chave: 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