大陆与大陆沿俯冲带的碰撞使大陆扩大，而沿扩张中心的断陷使它们再次分开。

Continent to continent collisions along subduction zones makes continents larger, while rifts along spreading centers break them apart again.

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虽然辛顿和鲍尔斯目前只考察了加拉帕戈斯扩张中心的一小部分，但他们已有的数据将帮助他们最终了解该海脊是如何形成的。

Though Sinton and Bowles have only explored a small portion of the GSC, they already have data that will help them eventually understand how the ridge formed.

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很多的，但不是所有的较大的地慢羽沿着扩张中心分布开来，说明地慢羽在裂隙形成和新扩张中心的诞生中可能是起作用的。

Many, but not all, of the larger plumes are situated along spreading centers, suggesting that plumes may be instrumental in the formation of rifts and the origin of new spreading centers.

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