您要查找的是不是：
- dlpine permafrost 方山冻土
- Methane Bubbling Up From Undersea Permafrost? 甲烷从海底永冻层带冒出？
- But it's also melting permafrost around the world. 但它也使世界各地的冻土融化。
- This is the vegetational climate of arctic permafrost regions. 这是北极永冻地区的植物气候。
- Melting permafrost will hit existing and planned infrastructure. 冻土融化将冲击我们现有的和计划中的基础设施建设。
- 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。
- But a layer outside the permafrost is suffering the human threat. 可是地球的外圈层正受到人类的威胁。
- Perhaps this is caused by the sudden melting of subsurface permafrost. 可能是地下永久冻土突然融化所造成。
- About half of the Golmud-Lhasa 19) section was built over permafrost. 格尔木到拉萨段铁道大约有一半是建在冻土上。
- Thawing and refreezing each year, an active layer of soil lies over permafrost. 覆盖在永冻层上方的一层活冻层土壤，每年都会融化和重新冻结。
- Engineering damages of embankment in permafrost regions are mainly caused by thaw settlement of permafrost. 摘要多年冻土区道路病害主要是由路基下冻土温度升高融化下沉引起。
- 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。
- In permafrost areas in the Soviet Union or Canada or Alaska, ice has been used effectively for walling and roofing. 在苏联、加拿大或阿拉斯加的永久冻土地区，冰一直很有效地用来做墙和屋顶。
- The harder the material under the permafrost is, the larger the chamber charge required. 永冻层之下的土壤越硬，所需要的药室装药量也越大。
- Its stability is destroyed with longitudinal cracks of embankment caused by asymmetric settlement of permafrost. 由于阴阳坡差异引起路基不均匀沉降而导致的路面纵向裂缝病害严重影响了路基的稳定性。
- The polar ice caps are made of frozen water and carbon dioxide, and water may be frozen in the ground as permafrost. 极地冰帽是由固态水和二氧化碳组成的,水也有可能存在于永久冻土之中。
- Vladimir Romanovsky, a permafrost expert also at the University of Alaska, Fairbanks, says the study is worrying. 一名用冻土层专家，同样来自位于费尔班克斯的阿拉斯加大学，称研究令人担忧。
- Further loss of permafrost could threaten migration patterns of animals such as reindeer and caribou. 未来若永冻土进一步流失，将可能威胁到迁移性动物，如驯鹿以及北美驯鹿。
- The priority is to ascertain which kurgans still have a layer of permafrost below them and might therefore be saved. 关键问题是弄清楚哪些库刚下面仍然有着一层冻土因此可以被保存下来。
