キーワード: 即時(shí)通訊_____________，企業(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)