キーワード: 即時(shí)(shí)(shí)通訊____________，企業(yè)(yè)(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)(fā)(fā)