尼日尔

The 60 largest sovereign countries in the world by land area.

Every sovereign country across all six inhabited continents.

All countries of the African continent.

对比横跨七个数量级面积的18个国家——从梵蒂冈、摩纳哥和瑙鲁到尼日尔、毛里塔尼亚与澳大利亚等广袤大国。