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