We know the number of volcanoes has greatly declined since the beginning of the world. This means that the heat at the center of the earth, which causes volcanoes to explore, has greatly declined, as well."
我们了解到从地球早期开始火山的数量就在大幅度的减少。这就意味着引起火山爆发的地球核心温度也降低了很多。