冰川把丘陵地带冲出一条条山谷。
冰川是流动成河的冰。
这一发现将有助于科学家揭开冰川时代的奥秘。
The discovery will help scientists unravel the mystery of the Ice Age.
冰川和基岩之间的摩擦减少了。
在冰川的底部形成了一层液体。
过剩的降雪是冰川形成的必要条件。
第一种冰川流动被称为：基底滑动。
冰川的变形量涉及哪些因素？
What factors are involved in the amount of deformation a glacier undergoes?
它使得冰川在基岩上滑动。
冰川的上层会形成裂缝。
当冰川消退，分离的动植物种群再次接触。
When the glaciers retreated, the separated populations of plants and animals came into contact again.
这些土壤是冰川随着气候变暖而后退的证据。
These soils were evidence that the glaciers retreated as the climate warmed.
根据冰川上的压力，其中的冰晶会重新组织。
Depending on the stresses on the glacier, the ice crystal within it reorganized.
现在你可能已经知道冰川通常移动得非常缓慢。
Now, as you probably know, glaciers generally move really slowly.
冰川系统由两个基本的气候变量控制：降水和温度。
The glacial system is governed by two basic climatic variables: precipitation and temperature.
由于全球变暖带来的冰川融化对农业造成了巨大的威胁。
The loss of glaciers due to global warming represents an enormous threat to agriculture.
由于全球变暖造成的冰川融化对农业造成了巨大的威胁。
The loss of glaciers there due to global warming represents an enormous threat to agriculture.
冰川是开放系统，雪是系统的输入，融水是系统的主要输出。
Glaciers are open systems, with snow as the system's input and meltwater as the system's main output.
在这些不同的地区，Agassiz都能发现冰川侵蚀和沉降的痕迹。
In all these diverse regions, Agassiz saw signs of glacial erosion and sedimentation.
冰川国家公园目前只有大约25座冰川，而在一个世纪前约有150座。
Glacier National Park now has only about 25 glaciers, compared with around 150 a century ago.
现在，这样的速度是很不寻常的，比冰川的正常移动速度快几百倍，但是你可以看到冰川在这些涌动中移动，虽然很少见。
Now, speeds like that are pretty unusual, hundreds of times faster than the regular movement of glaciers, but you can actually see glacier move during these surges, though it is rare.
这些山丘是冰川作用形成的。
世界上的冰川正迅速融化。
他想保护冰川的水不受污染。
世界上几乎所有的冰川都在融化。
一些米勒冰川已经完全消失了。
冰川正在消失，乞力马扎罗山的面貌随之改变。
The glaciers are disappearing, changing the face of Kilimanjaro.
对于那些使用恒定的冰川融化的水作为饮用水的数百万人来说，冰川面积不断缩小是一个难题。
Shrinking glaciers are a problem for million is of people who use regular glacier melt for drinking water.
我们必须尽量保持更多的冰，减缓冰川融化的速度。
We must try to keep much ice possible and slow the speed of glacier melting.
我们必须尽量保持更多的冰，减缓冰川融化的速度。
We must try to keep much ice possible and slow the speed of glacier melting.
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