到了尼加拉瓜马萨亚火山火山口是一次惊心动魄的经历中，伴随强烈的硫磺气味和鹦鹉的尖叫声搞活。

The view into the crater of the Masaya Volcano in Nicaragua is a breathtaking experience, enlivened by the accompanying strong smell of sulphur and the loud screaming of parrots.

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据美国地质调查局，旧金山火山带上大约有600座火山，在过去的6百万年里，它们爆发在不同的时期。

According to the U. s. Geological Survey, more than 600 volcanoes occur in the San Francisco Volcanic Field, and they have erupted at various times over the past 6 million years.

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据美国地质调查局，旧金山火山带上大约有600座火山，在过去的6百万年里，它们爆发在不同的时期。

According to the U.S. Geological Survey, more than 600 volcanoes occur in the San Francisco Volcanic Field, and they have erupted at various times over the past 6 million years.

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It's like a moveable feast; you put your explosion where you need it at any particular moment.

它就像一个万能贴,你可以把火山爆发,置于你所需要的特定时刻

耶鲁公开课 - 古希腊历史简介课程节选

You have, like lava emerging from a volcano, a rupture.

相反，就像岩浆从火山喷出一样，突然爆发。

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The trouble is, you just don't know when that explosion took place, and since there are several periods in this general area that we're talking about now, in which something big happened, some great change takes place, it turns out different people want to have their explosion at different times.

问题是,你不了解火山爆发的,确切时间以及这种爆发,在这个区域又延续了很多个时期,这些时期发生了许多重大事件和重大变化,结果就是不同人对,火山爆发的时间推测各不相同

耶鲁公开课 - 古希腊历史简介课程节选