キーワード: 即時(shí)通訊______________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通____________________，龍笛即時(shí)通__________，視頻會(huì)議______________________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)_______，手機(jī)端