Many mountains are the result of volcanoes. 许多山峰都是火山的产物。

　　A long time ago, many mountains were formed by volcanic activity. 很久以前，很多山峰都是由火山运动形成的。

　　When a volcano explodes, it releases a lot of heat from the inside of the Earth. 火山喷发时，会从地球内部释放出大量的热量。

　　Volcanoes also release a lot of gas, steam, and ash. 火山还会释放出大量的气体、蒸汽和灰尘。

　　Because of this heat and steam, we can easily find hot springs near volcanoes. 正是由于这样的热量和蒸汽，我们就很容易在火山附近找到温泉。

　　Sometimes volcanic ash covers the sky and can last a few months. 有时候，火山灰笼罩在空中好几个月都不散去。