When the molten rock of the earth’s core forced its way to the surface to form the throat of a volcano, as the centuries passed, the rock cooled and hardened, shrinkingand cracking into long columns.
出自-2016年12月聽(tīng)力原文
When the molten rock of the earth's core forced its way to the surface to form the throat of a volcano, as the centuries passed, the rock cooled and hardened, shrinking and cracking into long columns.