凍土 angolul

Kínai	Angol
凍土 noun	gelisol(soil type) noun
凍土層 noun	tundra(flat treeless arctic region) noun [UK: ˈtʌn.drə] [US: ˈtʌn.drə]
永久凍土 noun	permafrost(permanently frozen ground) noun [UK: ˈpɜː.mə.frɒst] [US: ˈpɝː.mə.frɒst]

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