在其他情况下，较细的颗粒可能被除去，而沙粒大小的颗粒堆积起来形成移动的山丘或沙脊。
In other cases, the finer particles may be removed, while the sand-sized particles are accumulated to form mobile hills or ridges of sand.
当岩浆从中海脊下涌起的时候，岩浆中的磁铁矿物质按地磁场的方向被磁化。
As magma rises under the mid-ocean ridge, ferromagnetic minerals in the magma become magnetized in the direction of the magma become magnetized in the direction of the geomagnetic field.
在南威尔士社工的帮助下，乔治雅去了位于北卡罗来纳州蓝脊山的水源学院。
Social workers at home in Aberdare, South Wales, helped Georgia get all the way to Wellspring Academy of the Carolinas in North Carolina's Blue Ridge Mountains.
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