キーワード: 即時通訊___________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通__________________________，龍笛即時通__________________，視頻會議___________________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)_____________，手機(jī)端