When a reservoir is sufficiently large, a sphere of this hot rock forces its way up through the upper mantle to Earth's surface, creating a broad bulge in the topography.
当储层足够大时，这种炽热岩石的一个球体强行通过上地幔上升到地球表面，在地形上形成一个宽阔的隆起。
2
The Earth is shaped like a sphere and composed mostly of rock.
地球的形状象个球体，大部分由岩石组成。
3
This research shows rock pore structures in figures with the sphere-cylinder model.