Schlüsselwort: 即時(shí)(shí)(shí)通訊_____________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通__，龍笛即時(shí)(shí)(shí)通___________，移動(dòng)(dòng)(dòng)辦公_，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)