极限挑战第四季免费

　　For the first time ever, the ancient history of the United Arab Emirates is depicted in this informative and entertaining three-part documentary series. Stretching back 125,000 years and culminating in the union in 1971, HISTORY OF THE EMIRATES profiles the ancient foundations of the modern country - exploring some of the region's most historic sites, uncovering innovations tha... (展开全部)