火山

• Their breath comes up through the mountain and is what men call the eruption of the volcano .
  它们的呼吸穿过山顶，这就是人们所说的火山爆发。
• Volcanic tremor is due to the oscillation of magmatic gas or due to the crater-wall downfall .
  火山地震由火山气体振荡或火山口内壁的崩塌引起。
• Great disturbances at the heart of the earth caused mountains and volcanoes to rise above the water .
  由于地心的剧烈活动，使山脉和火山露出水面。
• 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。
• Many of the procedures we tried had never been used before on an active explosive volcano .
  我们采用的许多试验方法，过去还从未在一次活喷发火山地区用过。
• At the same time, we hoped to learn about processes of volcanism that have rarely been observed before .
  同时我们希望弄清过去很少能观察到的火山作用过程。
• Present evidence points to a volcanic origin far in the past for the majority of the craters .
  最近的资料表明，现在比过去更倾向于火山是大多数环形山的起因。
• Models of how volcanoes work and evolve have become important tools in mineral exploration .
  关于火山是怎样活动和演化的模型，已成为矿物勘探的一个重要工具。
• 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。
• Scientists suspect that this slow rate explains why eruptions occur infrequently in the area .
  科学家们认为，这样慢的速度可以解释为什么在这一地区火山喷发并不频繁。