Here Earth's crust pulls apart, and upwelling magma cools and forms new crust that spreads away from the ridge in the great recycling process known as plate tectonics.
地壳在这里碰撞挤压,上涌的炙热岩浆变冷,又形成了新的地壳,这种伟大的循环过程就是所谓的板块构造。
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Taking and developing photos using the so-called "wet-plate" process was a meticulous, multi-step procedure that required more than one "camera operator" and lots of chemicals and equipment.