The dip, he says, was triggered by a burst of volcanic activity that deposited new silicate rocks.
他表示，低浓度是由一系列火山活动储存新的硅酸盐岩石触发的。
Carbonic acid (essentially soda pop) dissolved in silicate rocks is transported to our oceans by rain.
碳酸(本质上就是汽水)溶解在硅酸盐岩中通过雨水的方式传送到大海中。
As the ice spread, however, it gradually covered the silicate rocks, slowing the erosion and so allowing CO2 to build up in the atmosphere once more.
但是，随着冰层扩展逐渐覆盖了硅酸盐岩石，使岩石形成放缓，所以导致CO2在大气层中再次聚积。
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