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