Mot-clefs : 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)