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永久凍土えいきゅうとうど

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えいきゅうとうど
Parts: 永久 凍土
Meaning
    1. ①
      permafrost
      地球ちきゅうの表面ひょうめんの５分ごぶんの１いちは永久凍土えいきゅうとうど層そうに覆おおわれている。
      One fifth of the earth's surface is covered by permafrost.
    1. ①
      EN In geology, permafrost is ground, including rock or (cryotic) soil, at or below the freezing point of water 0 °C (32 °F) for two or more years.
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Kanji
永 エイ eternity, long, lengthy 久 キュウ long time, old story 凍 トウ frozen, congeal, refrigerate 土 ド soil, earth, ground
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