It is in fact this cooling which powers the slow circulation of the mantle, and through that the endless remaking of the surface through plate tectonics.
事实上，这种冷却过程为地幔的缓慢流动提高了动力，驱使着板块运动，实现无止境地重塑地球表面。
2
Its second job is to measure changes in the salt content of the surface of the seas, which will improve understanding of what drives ocean circulation patterns around the world.
它的第二个任务是，测量地表和海洋的盐含量变化，这将提高我们对世界各地海洋环流模式动力的认识。
3
A stylish construction of flexible metal arcs and mesh covered contact surface areas enable efficient air circulation between the rucksack and the back.