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)(jī)端