キーワード: 即時(shí)(shí)(shí)(shí)通訊____________，企業(yè)(yè)(yè)(yè)溝通_______，龍笛即時(shí)(shí)(shí)(shí)通___，視頻會(huì)(huì)(huì)(huì)議_，集成開發(fā)(fā)(fā)(fā)________，手機(jī)(jī)(jī)(jī)端