火山石

例句：

1. 1. The volcanic rocks are formed by the eruption of molten lava froma volcano.
   火山岩是由火山喷发形成的熔岩。
2. 2. Volcanic activity is amajor concern for geologists studyingthe Earth's past.
   火山活动是地质学家研究地球过去时的主要关注点。
3. 3. The volcanic eruptions have caused significant damage to the surroundingenvironment.
   火山喷发对周围环境造成了重大损害。