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