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)辦公_________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)