单词 permafrost 释义 permafrost|pmfrst|[f. permanent a. (n.) + frost n.]Subsoil or other underground material that is at a temperature of less than 0C throughout the year, as in Arctic regions; permanently frozen ground.1943S. W. Muller Permafrost or Per...
单词 permafrost 释义 permafrost n[U] subsoil that is permanently frozen, eg in polar regions 永冻土, 永冻层(如在极地的). 英汉双解词典包含38652条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。 ...