英语词汇permafrost怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	permafrost
释义	N23503340permafrostSpoken.20Fiction.37Magazine.148Newspaper.45Academic.90 permafrost /ˈpɜːməfrɒst/ noun mass noun a thick subsurface layer of soil that remains below freezing point throughout the year, occurring chiefly in polar regions 永久冻土。词源 1940s: from PERMANENT+ FROST.
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