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