The large of the two deserts,the Uyuni salt desert,is 12,000 square kilometres.

The large of the two deserts,the Uyuni salt desert,is 12,000 square kilometres.
The large of the two deserts,the Uyuni salt desert,is 12,000 square kilometres.

The large of the two deserts,the Uyuni salt desert,is 12,000 square kilometres.
这两个大沙漠,沙漠的乌尤尼盐,1.2万平方公里.

两个大沙漠中的较大者名为乌尤尼盐大沙漠，面积为12000平方公里