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。

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.

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海底钻井平台将寻找石油的区域延伸到了海洋大陆架——大陆边缘那些平缓倾斜的海底区域。

Offshore drilling platforms extend the search for oil to the ocean's continental shelves—those gently sloping submarine regions at the edges of the continents.

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在大气的外部边缘处，由于大气已经远远地延伸到太空，实际意味着它正在冷却。

At the outside edge of the atmosphere, that actually means that it's getting colder because it's pushed farther out into space.

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