Mot-clefs : 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