キーワード: 即時(shí)(shí)通訊_____________________，企業(yè)(yè)(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)(fā)(fā)_____________，手機(jī)(jī)(jī)(jī)端