permanently frozen ground翻译
permanently frozen ground的基本解释
读音: 美: 英:
永久冻土：指在地表下一定深度范围内，温度低于0℃，土壤或岩石中的水分凝结成冰，形成的一种地质现象。
例句
They looked in particular at the creation of "taliks", which are patches of unfrozen ground sandwiched between layers of permanently frozen soil lower down and a seasonally frozen patch of soil above.他们尤其考量了位于底层永久冻结土壤和上层季节性冻结土壤之间的居间不冻层的形成。
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