名词
中文翻译：火山口填充物
同义词：
['volcanic ash', 'lava flow', 'pyroclastic material']
例句：
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1. The volcano erupted, and the crater filling was scattered across the landscape.
火山爆发了，火山口填充物散落在地面上。
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2.The pyroclastic material is being used to fill in the crater.
正在使用熔岩流来填充火山口。
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3.The lava flow was a result of the volcanic activity, and it filled the crater.
熔岩流是火山活动的结果，它填满了火山口。