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
Just last November new studies of Saturn's moon Enceladus strengthened the case for a reservoir of warm water buried beneath its craggy surface.
去年十一月对土星的卫星恩克拉多斯的最新研究巩固了认为其崎岖的表面之下蕴藏着大量热水的看法。
3
Foam is the other common type of air in oil. Foam typically refers to the stable layer of relatively large bubbles that accumulate at the surface of a reservoir.