| 1. | Basalt is the commonest volcanic rock . 玄武岩是最普通的火山岩。 |
| 2. | This is unlike volcanic activity above the sea . 这同高出洋面的火山活动是不同的。 |
| 3. | For millions of years, the area was highly volcanic . 这个地区几百万年来火山活动强烈。 |
| 4. | The most impressive volcanic phenomena are explosive eruptions . 最令人难忘的火山现象是爆炸喷发。 |
| 5. | Volcanic rocks have high susceptibilities under normal conditions . 火山岩在正常情况下有强的磁化率。 |
| 6. | Most volcanic eruptions in recorded history have blown skyward . 历史上有记载的大多数火山喷发是向天空喷发的。 |
| 7. | A group of volcanic vents will produce a lava of the same mineral composition . 一群火山口将产生相同矿物成份的熔岩。 |
| 8. | The islands being wholly of volcanic origin, the soil is necessarily very rich . 岛上全是火山地带,土质自然非常肥沃。 |
| 9. | Active faults and lineaments, and recent volcanic activity were re-examined . 对活断层,线状区和近代火山活动都重新作了研究。 |
| 10. | Earthquakes commonly accompany volcanic activity on movement of magma deep in the earth . 地震通常都伴随着火山活动或地球深处的岩浆运动。 |