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(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)