キーワード: 即時(shí)通訊_____________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通____，龍笛即時(shí)通_________________，移動(dòng)辦公_____________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)