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)________________________，金笛短信