Palavra chave: 即時(shí)(shí)通訊_________，企業(yè)(yè)(yè)(yè)(yè)溝通____________，龍笛即時(shí)(shí)通____，視頻會議_______，集成開發(fā)(fā)(fā)(fā)(fā)_____，手機(jī)(jī)端