The largest desert in the world is the Antarctic Desert. Unlike traditional deserts, it is not hot but meets the definition of a desert—extremely low annual precipitation (less than 250 mm). About 98% of Antarctica is covered by ice, but its dry air and minimal¹ rainfall make it the planet's largest desert, covering approximately 14 million square kilometers.

世界上最大的沙漠是南极沙漠（Antarctic Desert），尽管它不像传统沙漠那样炎热，但符合沙漠的定义——年降水量极低（每年少于250毫米）。南极洲约98%的面积被冰雪覆盖，但其干燥的空气和极少的降水使其成为全球最大的沙漠，总面积约1400万平方公里。

Excluding polar deserts, the Sahara Desert is the largest hot desert, spanning North Africa with an area of 9.2 million square kilometers—similar in size to China or the United States. It features extreme temperatures, vast dunes², rocky plateaus, and rare oases³.

若排除极地沙漠，撒哈拉沙漠（Sahara Desert）是最大的热带沙漠，横跨北非，面积约920万平方公里，相当于中国或美国的国土面积。其气候极端，日温差大，以沙丘、岩石高原和绿洲闻名。