摘要：A large-scale eruption would produce an estimated 1.7 billion cubic meters of volcanic ash, of which around 490 million cubic mete

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请先阅读理解下面句子：

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A large-scale eruption would produce an estimated 1.7 billion cubic meters of volcanic ash, of which around 490 million cubic meters is expected to accumulate on roads, buildings, and other land areas, requiring disposal.

核心词汇：

eruption /ɪˈrʌpʃ(ə)n/ 喷发，爆发

accumulate /əˈkjuːmjəleɪt/ 积累，累积，积聚

disposa /dɪˈspəʊz/ 处理，清除

句型及句子成分分析：

这是一个主从复合句，主句＋定语从句

1.主句（主谓宾）

A large-scale eruption would produce an estimated 1.7 billion cubic meters of volcanic ash

主句主语：A large-scale eruption

主句谓语：would produce

主句宾语：an estimated 1.7 billion cubic meters of volcanic ash

2.定语从句（主谓句型）

of which around 490 million cubic meters is expected to accumulate on roads, buildings, and other land areas, requiring disposal.

从句主语：around 490 million cubic meters

从句谓语： is expected

从句主语补足语：

to accumulate on roads, buildings, and other land areas

从句结果状语：现在分词短语 requiring disposal

注：of which中which指代volcanic ash，做从句主语的定语。

参考译文：

火山一次大规模喷发预计将产生约17亿立方米的火山灰，其中约4.9亿立方米预计会堆积在道路、建筑物及其他陆地区域，需要后续处理。

来源：鑫鹏教育