单词：volcanic rock
volcanic rock的用法和样例：
例句
- Basalt is the commonest volcanic rock.玄武岩是最普通的火山岩。
- Volcanic rock can become favorable oil-gas reservoirs.火山岩可以成为良好的油气储层。
- A seam of ingeous rock crops out at that point.一层火成岩在那儿冒出来。
- Igneous rock that has solidified beneath the earth's surface.已经在地表凝固的火成岩。
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