キーワード: 即時(shí)(shí)(shí)(shí)通訊____________，企業(yè)(yè)(yè)(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)(fā)(fā)(fā)_______________，手機(jī)(jī)(jī)(jī)(jī)(jī)端