permafrost

noun

1. （寒带）永冻土层；永冻层
   a layer of soil that is permanently frozen, in very cold regions of the world

1. 永冻土层；永冻层
   Permafrost is land that is permanently frozen to a great depth.

1. How much methane and carbon dioxide might be released from the rotting permafrost?
   一个腐烂的永久冻土层，将释放出多少甲烷和二氧化碳？
2. The permafrost contains immense amounts of frozen organic matter that have been accumulating for millennia.
   永久冻土层经过千万年的累积形成，其中包含了巨量的冻僵的有机物。
3. An example of a tipping point is the thawing of the permafrost.
   气候引爆点的一个例子就是永久冻土层的融化。
4. Thermal state of permafrost under high embankment along Qinghai& Tibet Railway is monitored and studied.
   对青藏铁路高路堤下多年冻土热状态监测结果进行分析研究。
5. Influence of Snow Cover on the Lower Limit of Permafrost in Altai Mountains
   我国阿尔泰山地区雪盖对多年冻土下界的影响
6. Dr Lawrence and researchers at National Snow and Ice Data Centre used computer models to analyse how the loss of sea ice could influence rising air temperatures and the melting of permafrost.
   劳伦斯和美国国家冰雪数据中心的研究人员利用计算机模型分析了海冰的缩减对气温上升和永久冻结带融化的影响。
7. Study on the Cracks on Permafrost Embankment during the Operation of Qinghai-Tibet Railway
   青藏铁路运营期间冻土路基裂缝问题研究
8. Russian scientists have discovered whole mammoths frozen within the Siberian permafrost.
   俄国科学家在西伯利亚的永久冻土里发现了整头的猛犸。
9. Application Analysis of Heat Pipe in Permafrost Subgrade by Numerical Simulation
   热管在冻土路基中应用的数值模拟分析
10. The Qinghai-Tibet railway is the first railway in permafrost region which built on Qinghai-Tibet plateau in China.
    青藏铁路是中国在青藏高原修建的第一条多年冻土区铁路。
11. This is the vegetational climate of arctic permafrost regions.
    这是北极永冻地区的植物气候。
12. And the permafrost is thawing.
    现在这些冻土层正在融化。
13. Cover Story: Gas hydrate from Qilian Mountain Permafrost, Qinghai Province.
    封面故事：青海省祁连山的天然气水合物。
14. Block stones were used to protect permafrost from thawing by air convection effect in the embankment of Qinghai-Tibet Railway.
    青藏铁路广泛采用的块石护坡和块石路基是通过空气对流降低路基的温度起到保护冻土的作用。
15. These trees put their roots down in the permafrost.
    这些树扎根于永久冻土中。
16. The Application of Ground Penetrating Radar to Permafrost Investigation in Qilian Mountains
    探地雷达在祁连山多年冻土调查中的应用
17. And has collapsed as the permafrost thaws.
    永冻土融化，建筑随之倒塌。
18. This article introduces the status quo of engineering and technology of foreign pipelines in permafrost regions, and puts forward the relative countermeasures for the construction of pipelines in the regions in allusion to the frost heaving and thaw settlement of country rock and soil along the pipeline route.
    摘要介绍了国内外冻土地区管道工程技术现状，针对冻土地区管道沿线和周围（岩）土的冻胀和融沉问题，提出了相应的对策。
19. Study on Design and Construction Techniques of Special Subgrade for Permafrost Areas
    多年冻土地区特殊路基设计与施工技术研究
20. Instead of building directly over permafrost, they chose to build some parts on high bridges.
    他们不在冻土上直接修筑铁路，而是选择某些部份盖在高架桥上。
21. The Effect of Embankment Construction on Permafrost in the Tibetan Plateau
    路基施工对青藏高原多年冻土的影响
22. The Highway Construction Technology in Permafrost Regions: Research and Engineering Practice
    多年冻土地区公路修筑技术研究与工程实践
23. In permafrost region, the key about the stability of earth structure is itself thermal stability.
    在多年冻土地区，土工结构稳定的核心是结构自身的热稳定性。
24. The embankment with crushed-rock slope protection is a main measure for cooling the permafrost under the Qinghai-Tibet railway.
    块石护坡路基是青藏铁路建设中一种有效的冷却地基保护冻土工程措施。
25. Canadian researchers expressed serious concerns about the erosion of permafrost in the Arctic.
    加拿大研究人员对北极地区永冻层的侵蚀表示严重关切。
26. Influence of Vegetation Coverage on Water and Heat Processes of the Active Layer in Permafrost Regions of the Tibetan Plateau
    青藏高原多年冻土区植被盖度变化对活动层水热过程的影响
27. The construction techniques for culverts in plateau permafrost regions are introduced.
    阐述了高原多年冻土区各类涵洞施工工艺。
28. Clathrates exist in large quantities in Arctic permafrost and, under great pressure, beneath oceans.
    北极的永久冻结带中存在着大量气水包合物，它们位于海底，处于巨大的压力之下。
29. A recent study suggests, however, that permafrost ices below the surface of Mars may have altered the effects of impact on it.
    但是，近来的研究表明，火星土层表面下的永久冻结冰可能改变了这种冲击效应。
30. Study on Subgrade Filling and Foundation Soil in Permafrost Region along the Qinghai-Tibet Railway
    青藏铁路冻土区路基填料及地基土研究

noun

1. ground that is permanently frozen