キーワード: 即時(shí)通訊_____________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_________________，龍笛即時(shí)通____________________，視頻會議________________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)________，手機(jī)(jī)端