volcanic rock

例句：

1. 1. The ancient volcanic rock formations are a testament to the power of nature.
   古老的火山岩形成物是大自然力量的见证。
2. 2.The volcanic rock is incredibly hot and can be used for heating purposes.
   这种火山岩非常热，可以用来加热。
3. 3. Volcanic rocks are formed by the eruption of molten lava from a volcano.
   火山岩是由火山喷发产生的熔岩形成的。