It had been assumed that the ice extended westward from the Alaskan/Canadian mountains to the very edge of the continental shelf, the flat, submerged part of the continent that extends into the ocean.

人们过去曾猜测，冰山从阿拉斯加和加拿大山脉向西延伸到大陆架的最边缘，也就是大陆架扁平的、延伸到海洋中的水下大陆那部分。

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On the remote western edge of Uganda the land suddenly drops down into the western arm of the Great Rift Valley to reveal the vast expanse of Lake Albert and the blue mountains of Congo beyond.

在乌干达遥远的西部边区，突然之间大地陷入了东非大裂谷（Great Rift）西翼的怀抱，绵延广阔的阿尔伯特湖（Lake Albert）就藏在山谷之中，它的外面就是刚果的蓝山山脉。

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Then one dives under and the very edge of the plate riding on top is rumpled, mountains building by this rumpling.

然后一个板块潜到下面，在上面的那个板块的边缘起皱了，在此起皱的时候就有了造山运动。

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Meanwhile, the two Black Hawks were quickly approaching Abbottabad from the northwest, hiding behind the mountains on the northernmost edge of the city.

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The energy, support and expectations surrounding this Buffaloes program are as high as the mountains that surround the western edge of its campus.

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But the ones here along the western edge of the Rocky Mountains aren't ordinary prairie dogs.

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