名词
中文翻译：火山灰
同义词：
['volcanic ash', 'volcanic rock例句：1. The construction of the new bridge required a large amount of pozzolan for its foundation.（建造新桥需要大量的火山灰作为其基础。）']
例句：
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1. The construction of the new bridge required a large amount of pozzolan for its foundation.
建造新桥需要大量的火山灰作为其基础。
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2. The volcanic eruption caused significant damage to the surrounding area.
火山喷发对周围地区造成了重大损害。
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3. The pozzolan was used as a natural insulator in the building's walls.
火山灰被用作建筑墙壁的自然绝缘材料。