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