名词
中文翻译：火山灰
同义词：
['pyroclastic material', 'volcanic ash']
例句：
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1. The eruption of MountVesuvius has left a plumasite layer on the surrounding area.
维苏威火山的喷发在周围地区留下了火山灰层。
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2. The scientistscollected samples from the siteto study the effects of plumasite on ecosystems.
科学家们从该地点收集样本，研究火山灰对生态系统的影响。
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3. The city was covered in athick layer of plumasite after thevolcanic eruption.
在这次火山喷发后，城市被厚厚的火山灰覆盖。