| 1. | This is unlike volcanic activity above the sea .
这同高出洋面的火山活动是不同的。 |
| 2. | For millions of years, the area was highly volcanic .
这个地区几百万年来火山活动强烈。 |
| 3. | 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。 |
| 4. | At the galapagos rift, volcanic activity beneath two geologic plates renews the earth's crust .
在加拉帕戈斯裂谷，两地质板块下面的火山活动使地壳更新。 |
| 5. | The only apparent building process that the early earth scientists could detect was volcanic activity .
早期地质学家所能发现的唯一明显的构造作用就是火山活动。 |
| 6. | Volcanoes and earthquakes have been frequent along a great fault or weakness in the crust along this line .
沿着这条线上的地壳中大断层或脆弱带火山活动和地震一向很频繁。 |
| 7. | Volcanic activity has been responsible for large chunks of surface morphology in the western states, alaska, and hawaii .
火山活动是形成美国西部各州，阿拉斯加州和夏威夷州大片地形的主要原因。 |
| 8. | In this region of convergence we find the deepest earthquakes, great topographic relief, and intensive volcanic activity .
在这种聚合地区，我们发现了最深的地震，巨大的地形起伏和强烈的火山活动。 |
| 9. | Miyake island erupts and all residents evacuated
三宅岛火山活动，全岛居民避难 |
| 10. | The phenomena associated with volcanic activity
火山现象与火山活动有关的现象 |
