Perhaps this is caused by the sudden melting of subsurface permafrost.

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.

As permafrost gets warmer, it could become wetlands.

永久冻土变得更加温暖时, 将变成湿地.

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.

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.

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.

How much methane and dioxide might be released from the rotting permafrost?

腐烂的冻土层将会向空气中排放多少甲烷和二氧化碳?

The permafrost is thawing now.

正在解冻.

Many underground pipelines are carried with heating tracer in permafrost region.

分析了带伴热管的寒区埋地管道的几何特性,建立了数学模型.

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.

An example a tipping point is the thawing of the permafrost.

一个例子就是永久冻土层的融化.

Lastly, the relations between the climatic limit of permafrost and modern climatic snowline are discussed.

在此基础上, 进而探讨了中国现代气候多年冻土线与气候雪线之间的关系.

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?

Permafrost, cold, wind, and scant rainfall make it difficult for most and animals to survive here.

永冻土, 寒冷, 风和稀少的降水使得大多数动植物难以在这里生存.

This was a challenge, because the permafrost is barely permanent.

这是一大挑战, 因为这里的冻土并非永久不变.

They are distributed in polar permafrost horizons and submarine sediments.

分布于极地永冻层和海底沉积层中.

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.

The things we can touch have no permanence.

我们能够触摸到的东西没有永远.

The thing we can touch have no permanence.

我们能触摸到的东西没有永恒.

They all contain splendor , magnificence solidity, and permanence they are all substantiations of the spirit.

如此庄严 、 华丽 、 真实、永恒,如此精神实体化.

Conditions for permanence is established via the method of comparison involving multiple Liapunov functions.

进而,利用李雅普诺夫函数和比较定理确定了持续生存的条件.