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)_________，金笛短信