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Geologists therefore wondered whether the friction between the plates was being reduced by pockets of pressurized water within the fault that push the plates away from each other.

因此，地质学家们想知道，断层内部的加压水袋是否会使板块之间的摩擦力减小，从而使板块彼此远离。

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Friction arises because the molecules on both surfaces bond with each other, and resist when the surfaces try to move away and break the bonds.

摩擦力之所以产生，是因为两个表面上的分子彼此粘合，当表面试图移走并打破这种粘合时加以抵抗。

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Sometimes they may back away from the friction and return to the base, but hopefully they may move on to the next stage of transformation.

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But it also strips away a lot of the friction in grassroots efforts familiar to my father's generation too.

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Also friction from eating and other jaw movement can cause the bone around the implant to wear away.

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