永久冻土 [地理] permafrost ; perennially frozen ground ; perennial frost ; SWIPA
永久冻土生态系统 Permafrost ecosystems ; Prarst systs
永久冻土台 permafrost table
永久冻土层 permafrost
永久冻土区 permafrost area ; permafrost region
永久冻土下位水 subpermafrost water
永久冻土上的水 superpermafrost water
永久冻土研究机构 Institute of Eternal Frost
永久冻土水文学 [水文] permafrost hydrology
分层永久冻土 layered permafrost
它们的根长得不深，所以永久冻土不会影响它们的生长。
Their roots don't grow very deep, so the permafrost doesn't interfere with their growth.
造成这种情况的原因有两个：首先，它们生活在活动层中，请记住，活动层中包含的水不会渗透永久冻土。
There're two reasons for this: first, they live in the active layer, which, remember, contains water that doesn't penetrate the permafrost.
永久冻土融化导致甲烷和其他碳化合物释放到大气层，增加温室效应。
Thawing permafrost leads to releases of methane and other carbon compounds that can reach the atmosphere and increase greenhouse warming.
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