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When an underwater volcano pushes submerged rock to the surface, a new island is created.

当海底火山将水下的岩石推到表面时，一个新的岛屿就形成了。

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"I think the surface is (worth) a little bit more than three runs per over so we were pretty happy with containment, " said Martin.

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Airships demonstrate a law of increasing returns: doubling the length increases the surface area (and hence weight) by a factor of four while the volume (and hence lifting capacity) goes up by a factor of eight.

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