National Geographic
NationalGeographicisanAmericanpaytelevisionnetworkandflagshipchannelownedbytheNationalGeographicGlobalNetworksunitofDisneyEntertainment ...,NationalGeographicTelevision,NationalGeographicSociety'sforprofitTVarm,andNBCformedajointventure,NationalG...。參考影片的文章的如下: