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