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