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