This is part of the system of mid-ocean ridges that form as the tectonic plates of the Earth's crust move apart-a process known as sea floor spreading.

印度洋脊是中大洋脊的一部分，中大洋脊是地壳分离的地球板块形成的。这一形成过程被称为海底扩张。

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They called their theory "sea floor spreading." the theory explains that as the sea floor spreads, the tectonic plates are pushed and pulled in different directions.

他们把他们的理论叫做“海底扩张”。这个理论解释了，随着海底扩张，板块在不同的方向上被推拉。

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The blood — spreading crimson across my white shirt, pooling rapidly on the floor — was driving him mad with thirst.

那些血染红了我雪白的恤衫，飞快地汇聚在地板上，让他因为口渴而疯狂起来。

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On Earth, sea-floor spreading is fuelled by molten rock upwelling from deep inside the Earth.

BBC: Enceladus has 'spreading surface'

The Snyders watched most Redskins games at home, spreading a blanket on the floor as if they were tailgating.

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