2025-12-14 00:21:05 浏览次

permafrost是什么意思 英[ˈpɜːməfrɒst] 美[ˈpɜːrməfrɔːst] n. [地]永久冻结带n. ground that is permanently frozenpermafrost的用法和双语例句1. Permafrost covers much of the Arctic region.永久冻土覆盖...