| 词汇 | permafrost |
| 释义 | permafrost 1 ENTRIES FOUND: permafrost (noun) permafrost /ˈpɚməˌfrɑːst/ noun permafrost /ˈpɚməˌfrɑːst/ noun Learner's definition of PERMAFROST [noncount] technical : a layer of soil that is always frozen in very cold regions of the world永冻土 |
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