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单词 permafrost
释义

permafrost

noun
/ˈpɜːməfrɒst/
/ˈpɜːrməfrɔːst/
[uncountable] (specialist)
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  1. a layer of soil that is permanently frozen, in very cold regions of the world
    Word Origin1940s: from permanent + frost.
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更新时间:2024/12/23 15:37:59