Palavra chave: 即時(shí)通訊_________________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通____，龍笛即時(shí)通__________________，視頻會議__________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_______________，手機(jī)端