It seems possible that a sinking current of cooled mantle material on the upper side of the plate might be the cause of such deep basins.

看来，板块上侧冷却的地幔物质的下沉流可能是造成这种深盆地的原因。

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It is difficult to see how this applies to the ridge in the South Atlantic, where neither the African nor the American plate has a sinking part.

很难看出这如何适用于南大西洋的山脊，在那里，非洲板块和美洲板块都没有下沉的部分。

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Once the ocean plate begins to sink, it would be affected by another force—slab pull.

一旦海洋板块开始下沉，它就会受到另一种力量——板块拉力的影响。

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Where the Pacific plate collides with the Indo-Australian plate, it is forced downwards into the trench, a subduction zone, and the volcanoes are carried with it.

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Prof Sanders agrees that fruit and vegetables are not "super foods" that protect against cancer but - like many nutritionists - takes the view that it is better to fill up your plate with vegetables than a lot of the other high-calorie food it's so easy to snack on.

BBC: Five-a-day campaign: A partial success

As a consequence, it's almost impossible to over-exaggerate how remarkable it is that Sunday's big football match between River Plate and Boca Juniors - the two major football clubs in the country - has been moved to allow the nation to watch Pichot and his team in Paris.

BBC: Argentina's new hero