The Sahara is the largest desert in the world.

撒哈拉大沙漠是世界上最大的沙漠。

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The desert, already the largest desert in the world, could consume all of Northern Africa, altering the environment of a continent.

它早已是世界上最大的沙漠，(按这样的速度)它会吞没整个北非，同时改变非洲的环境。

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The lines of wind-sculpted sand are characteristic of immense sand deserts, or sand seas, and the Rub' al Khali is the largest desert of this type in the world.

在一些广袤的沙漠或沙海里常常有这种被风雕刻的痕迹，而鲁卜哈利沙漠是这类沙漠中面积最大的。

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Naturally it's called Four Corners. Nearby,you'll find the Painted Desert with sand of many colors, and the world's largest site of petrified prehistoric rock.

VOA: standard.2010.03.22

In addition, Apache is the largest producer of hydrocarbons and natural gas in the Western Desert of Egypt and the third largest in all of Egypt.

FORBES: In Top-Performing Energy Sector, Apache Stands Out In Solid Production and Profits

Exposure to extreme cold: the Antarctic Plateau, which will be crossed, is the world's largest and coldest desert with extremely low humidity and the expedition will involve prolonged periods of exposure to extreme cold below -70C.

BBC: Viewpoint: The last great polar challenge

In mid-February, Prince made a pilgrimage to the Saudi Arabian desert to meet with Citi's largest individual shareholder, Prince Alwaleed bin Talal, who has said recently that Citi needed to take "draconian" measures to cut costs.

FORBES: Weill Springs To Citi's Defense