Patchy permafrost is ede of vast and continuous permafrost zone which is degrading, it is discontinuous horizontally.
岛状多年冻土是大片连续多年冻土退化的边缘地带，具有平面上不连续特点。
参考来源 - 岛状多年冻土地区路基路面稳定性研究Finally, the reasonable design parameters were provided to the project, and the investigation was significant to the design of the thermosyphon foundation in the permafrost region in China.
最终,为该工程取得了合理的设计参数。 以上工作将对多年冻土地区热桩基础的设计有重要的参考价值。
参考来源 - 高寒地区高压输电杆塔热桩基础研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N-UNCOUNT Permafrost is land that is permanently frozen to a great depth. 永冻土层
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