Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.
Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.
永冻土永久冰冻的下层土壤，出现在整个北极地区和部分长期寒冷的地区
Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.
永冻土永久冰冻的下层土壤，出现在整个北极地区和部分长期寒冷的地区