キーワード: 即時(shí)(shí)通訊_______________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通____________，龍笛即時(shí)(shí)通_____，移動(dòng)(dòng)辦公____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)