Over 200 people have been killed by volcanic eruptions.
已有两百多人死于火山喷发。
Millions of years may pass between eruptions.
两次喷发之间可能过去了数百万年。
Before the eruptions, it was covered by forests of pine trees.
在火山爆发之前，它被松树林所覆盖。
It does erupt frequently, but those eruptions are usually minor.
它的确频繁喷发，但这些爆发通常都是小规模的。
Its height often changes when volcanic material accumulates during eruptions and subsequently collapses.
在火山爆发与随后的崩塌过程中，火山物质不断积累，它的高度经常发生变化。
It's quite possible that this is due to volcanic eruptions, because volcanic eruptions often emit gases.
这很有可能是由于火山爆发，因为火山爆发经常释放气体。
The focus is really on eruptions in the last five years, but it might have some useful background material.
人们关注的焦点其实是过去五年的火山爆发，但它可能会提供一些有用的背景资料。
However, its height often changes when volcanic material accumulates during eruptions and subsequently collapses.
然而，当火山物质在喷发过程中积累并随后崩塌时，它的高度经常发生变化。
Which of the following can be inferred from paragraphs 2 and 3 about the Volcanic eruptions of the late first millennium?
有关公元后一千年末期的火山爆发，下列哪一项可以从第2段和第3段中推断出来？
Gas mixtures emitted from present-day volcanoes resemble this early atmosphere, suggesting its origin from volcanic eruptions.
现代火山释放出的气体混合物类似于这种早期的大气，这表明它（地球）起源于火山喷发。
For them, the economic benefit they reap surpasses the risk of dying or losing property in one of the volcano's frequent eruptions.
对他们来说，他们获得的经济利益超过了在火山频繁喷发中死亡或财产损失的风险。
In 2018 alone, wildfires, volcanic eruptions, hurricanes, mudslides, and other natural disasters cost at least $49 billion in the United States.
仅2018年这一年，山火、火山爆发、飓风、泥石流和其他自然灾害就给美国造成了至少490亿美元的损失。
Dust from volcanic eruptions that blocks the Sun's warming radiation has been proposed as an explanation alternative to Milankovitch cycles for the cause of ice ages.
来自火山喷发的灰尘阻挡了太阳温暖的辐射，这被认为是导致冰河时代的另一种解释。
Some two hundred eruptions have been recorded down through the centuries, but compared with other volcanoes, most of its eruptions have so far been fairly light in terms of death and destruction.
几个世纪以来，这座火山约有200次爆发的记录，但与其他火山相比，这座火山的爆发程度迄今为止都相当轻，造成的死亡和破坏较少。
Katla seems to erupt on a semi-regular basis, with typical periods between eruptions of between 30 and 80 years.
卡特拉似乎是半规律地喷发的，典型的周期是每次爆发之间相隔30到80年。
The caldera was enlarged by later paroxysmal eruptions ending in the one of AD 79.
破火山口因后来的阵发性爆发而扩大，最终于公元79年一次爆发。
These eruptions have included: Hawaiian fire-fountaining, Strombolian explosions, and Plinian falls and ignimbrite.
这些喷发包括：夏威夷大火喷泉，斯特伦伯利亚大爆炸，普利尼安陨石和火成岩。
Most typically these eruptions are morbilliform.
典型的这类皮疹如麻疹样疹。
Thanks to volcanic eruptions, we also know it works.
因为有火山爆发，我们也知道这种办法很有效。
Ongoing eruptions there shut down roads all the time.
持续不断的喷发使道路一直处于闭塞状态。
Eruptions only on covered parts; worse after scratching.
这些疱疹只出现在被覆盖的部分；挠了之后更痒。
Small changes in rainfall can also trigger volcanic eruptions.
降雨量微小变化也能引发火山喷发。
The disruptions seem endless, from snowstorms to Icelandic eruptions.
从暴风雪到冰岛火山喷发，这种破坏似乎无止境。
But you don't need volcanic eruptions to make use of geothermal energy.
但是，为了利用地热能，你并不需要火山喷发。
Volcanic eruptions are usually preceded by earthquakes large and small.
火山喷发通常发生在地震之后。
However, some volcanic eruptions happen far from these crash sites.
然而某些火山喷发在离开这些碰撞很远的地方。
Occasional volcanic eruptions had layered minerals throughout the outcrops.
间歇的火山爆发使出露岩层的矿物分层。
Large volcanic eruptions spread cooling palls through the stratosphere.
火山大爆发将厚重的火山灰铺到了平流层。
Scientists are still uncertain as to why lightning occurs during some eruptions.
科学家尚不能确定火山喷发时闪电的形成原因。
The concept is based on the cooling effect of volcano eruptions on the atmosphere.
此观念基于火山爆发对大气的冷却作用。
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