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)