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.
在这一活跃层下面，是被称为“多年冻土”的第二层，终年冻结，不透水。
Beneath this active layer is a second layer called "permafrost", which is frozen all year around, and is impermeable to water.
冰河时代猛犸象的柔软部位，包括皮肤、毛发和内脏，被保存在冻土或石油渗出的焦油中。
Soft parts, including skin, hair, and viscera of ice age mammoths, have been preserved in frozen soil or in the oozing tar of oil seeps.
地质学家认为，这个具有流体化喷出物的陨石坑表明，在地表下几米深处有一层永久冻土层或水冰。
Geologists think that this fluidized ejecta crater indicates that a layer of permafrost, or water ice, lies just a few meters under the surface.
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.
答案可能是，现在火星上几乎所有的水都被锁在地表下的永久冻土层中，更多的水被包含在这个星球的极地冰帽中。
The answer may be that virtually all the water on Mars is now locked in the permafrost layer under the surface, with more contained in the planet's polar caps.
由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。
Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.
由于冻土融化，陆地会失去吸水性。
As the permafrost melts, the land loses its capacity to absorb water.
冻土上见到的最后一次日落。
“我一辈子都生活在冻土带上。”他说。
“气候引爆点”的一个例子就是永久冻土层的融化。
An example of a tipping point is the thawing of the permafrost.
人们相信，在西伯利亚冻土下埋藏着近千万的猛犸。
It is believed that 10 million mammoths are buried under the frozen soil of Siberia.
例如，随着冻土融解，二氧化碳增多，针叶林将继续北移。
The boreal forest will creep northwards, for example, as the permafrost thaws and carbon fertilisation increases.
温暖的气候也会帮助揭开哪些尘封在冻土之下的考古真相。
Warming temperatures may also help uncover archaeological evidence buried under permafrost.
在北极发生的其它气候正反馈还包括永久冻土融化和植被变化。
Other positive climate feedbacks that operate in the Arctic include the thawing of permafrost and vegetation changes.
据估计，可能约有500亿吨甲烷被困在西伯利亚湖永久冻土中。
It is estimated that some 50 billion tons of CH4 could be trapped in the Siberian Lake permafrost.
“这些永久冻土中的沉积物开始融化，并释放出甲烷，”麦斯林说。
"These permafrost deposits are now melting and releasing their methane," said Maslin.
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.
中心地区山不多。那里湖泊河流密布。低矮的植物生长在永久的冻土上。
Not in the center. It is full of lakes, rivers and low vegetation resting on permafrost.
中心地区山不多.那里湖泊河流密布.低矮的植物生长在永久的冻土上.
Not in the center. It is full of lakes, rivers and low vegetation resting on permafrost.
这是雅库特与泰梅尔的边界，这荒凉的冻土地区是一望无际的冰雪。
It's the border between Yakutia and Taymyr. The tundra and desolate expanses of snow.
雅库茨克是世界上建设在永久冻土上最大的城市——土壤在全年都保持冰冻。
Yakutsk is the largest city in the world built on permafrost - soil that remains permanently frozen year round.
这个钢质管道穿过强风不断的草原和无边无尽的覆盖于冻土之上的苔原。
The steel pipe crosses windswept plains and endless miles of delicate tundra that tops the frozen ground.
植物的生长或许可以在某些程度上平衡由于永久冻土融化而不断增加的碳排放。
Their growth will likely counterbalance some of the increased emissions from melting permafrost.
科学家说过去认为永冻土解冻会排放二氧化碳和甲烷，氧化亚氮则不会释放出来。
The scientists said that past studies had reckoned that carbon dioxide and methane were released by a thaw of permafrost while nitrous oxide stayed locked up.
颜色的差异很可能是因为卫星表面冻土的成分或者粒度与结构的区域性变化。
Color differences are most likely due to regional changes in surface composition or the sizes and structures of the grains in the moon's icy soil.
永久冻土和坚厚的岩层将确保遗传材料即使在没电的情况下保持冰冻状态并得到保护。
Permafrost and thick rock will ensure that even without electricity, the genetic material stored in the vault will remain frozen and protected.
永久冻土和坚厚的岩层将确保遗传材料即使在没电的情况下保持冰冻状态并得到保护。
Permafrost and thick rock will ensure that even without electricity, the genetic material stored in the vault will remain frozen and protected.
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