Called Chang 'an in ancient times, Xian is one of the birthplaces of the ancient civilization in the Yellow River Basin area of the country.

西安古称长安，是黄河流域的国家地区的古文明的发祥地之一。

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The sediment delivery ratio is not correlative with the river basin area, because which is not a influence factor but a units of measurement.

流域泥沙输移比与流域面积不存在固定的线性关系，其根本原因在于流域面积是度量衡单位，而不是影响因素。

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Brazil, the world's fifth largest country by area, has 5.3 million square kilometers of jungle and forests — mostly in the Amazon river basin — of which only 1.7 million are under state protection.

巴西是世界上国土面积第五大的国家，有530万平方公里的森林覆盖面积——大部分是在亚马逊河流域——但其中只有170万平方公里的森林受国家保护。

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New York City gets roughly half its water from the Delaware River Basin, a key area for hydraulic fracturing.

CNN: Debate over fracking, quakes gets louder

Their journeys eventually led them to the Sheenjek River basin the area that would one day form the heart of the ANWR.

NPR: Mardy Murie, Alaska's Passionate Protector

It covers an area roughly half the size of France within the Upper Paraguay River Basin, extending over the border into Paraguay and Bolivia.

BBC: Brazil��s land of the jaguar