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