一些山脉是由于这些板块相互碰撞，迫使板块边缘的岩石向上移动而形成的。
Some mountains were formed as a result of these plates crashing into each other and forcing up the rock at the plate margins.
另一些山脉可能是由地震引起的，地震使地壳断裂，并移动足够的岩石，从而形成块状山脉。
Other mountains may be raised by earthquakes, which fracture the Earth's crust and can displace enough rock to produce block mountains.
研究者说这有可能是由于哺乳动物向北部山脉移动、兽类短缺或是人类越来越偏爱其他的猎物种类造成的。
The researchers say this could be due to a northward range shift in the mammal, a scarcity of the beast, or an increasing human preference for other prey species.
（随着时间的推移，占优势的南美板块逐渐上升，形成高耸的安第斯山脉。）这种板块的移动说明了沿海的智利为什么有如此强烈地震的历史。
The plate movement explains why coastal Chile has such a history of powerful earthquakes.
该动画展现了一连串的雷暴聚结由阿帕拉契山脉向大西洋中部快速移动。
The animation shows a series of thunderstorms coalescing as the fast-moving front travels from the Appalachians toward the Mid-Atlantic.
冰川移动会侵蚀山地（冰川移动通常会导致出现角峰和冰斗谷），但是最冷的冰川被冻得固定在某个地方，就会保护山脉并且还会让它们“长高”。
Moving glaciers can cause erosion on mountains, but the coldest glaciers, frozen in place, protect mountains and allow them to grow taller. Cynthia Graber reports.
环绕大德顿的许多湖都是在几百万年前由冰层缓慢移动形成的。这山脉中有些小冰山至今仍然活动着。
Many of the lakes around the Grand Tetons were formed millions of years ago by slow-moving sheets of ice. Some small glaciers are still active in the mountains.
广阔的黑色山脉中，没有东西在移动，除了这两个活人的灵魂。
And nothing moved in all the length and breadth of those black mountains, except the two mortal souls.
当你在一个城市开始了的事情看似容易，但一旦你移动到峡谷，山谷和山脉最后它会变得很难。
Things may seem easy when you start out in a city, but once you move to the canyon, valley and finally mountains it will get hard.
因此地质学家一直研究的一个问题就是哪些力量中和了板块的移动和碰撞，并使得仍活跃的山脉在某一特定高度呈平衡状态。
So one question geologists are investigating is which forces counteract the shifting and colliding of the tectonic plates and enable still- active mountain ranges to level off at a certain height.
山脉是不断移动的吗？
例如，可以很容易理解当种群向大洋或山脉的反向移动时，新物种就会形成。
It's easy to see how that can happen when populations wind up on opposite sides of oceans or mountain ranges, for example.
惠特尼是部分的内华达山脉，一个断层山脉形成时移动板块导致了裂纹和断裂的地球表面。
Whitney is part of the Sierra Nevada, a fault-block mountain range formed when shifting tectonic plates led to the cracking and faulting of the Earth's surface.
惠特尼是部分的内华达山脉，一个断层山脉形成时移动板块导致了裂纹和断裂的地球表面。
Whitney is part of the Sierra Nevada, a fault-block mountain range formed when shifting tectonic plates led to the cracking and faulting of the Earth's surface.
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