キーワード: 即時(shí)(shí)(shí)(shí)通訊_________，企業(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)