Schlüsselwort: 即時(shí)通訊__________________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通_________，龍笛即時(shí)通______，移動(dòng)辦公_________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)