Palavra chave: 即時(shí)通訊_________________，企業(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)