キーワード: 即時(shí)(shí)通訊__________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_______________，龍笛即時(shí)(shí)通____，移動(dòng)(dòng)辦公_________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)