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English definition of “permafrost”

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noun [U] uk   /ˈpɜː.mə.frɒst/ us    /ˈpɝː.mə.frɑːst/ specialized
an area of land that is permanently frozen below the surface
Translations of “permafrost”
in Chinese (Traditional) 永凍層,永凍土層…
in Chinese (Simplified) 永久冻土…
(Definition of permafrost from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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