| 单词 | 火山爆发时 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔tephra〕Solid matter that is ejected into the air by an erupting volcano.火山灰：火山爆发时喷发到空气中的固体物质美国传统When volcanoes erupt, they throw out a lot of ash which consists of fine particles of lava.火山爆发时，喷发出大量火山灰，其中含有岩浆的微粒。剑桥国际 |
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