The 1980 volcanic eruption of Mount Saint Helens, for example, sent mud and debris into several tributaries of the Columbia River.

例如，1980年圣海伦斯火山爆发，导致哥伦比亚河的几条支流产生泥石流现象。

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On the summit of Mount Saint Helens, however, the real thing perfectly matched my expectations.

然而在圣海伦斯山的顶峰，现实完美地符合我的预想。

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Eruptions at glaciated volcanoes typically destroy ice fields, as they did in 1980 when 70 of Mount Saint Helens ice cover was demolished.

已冻结成冰的火山爆发会毁掉冰田，就想1980年当70%圣海伦山的冰盖就是这样被摧毁的。

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