英语词汇pyroclastic flow怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	pyroclastic flow
释义	pyroclastic flown. Geol. a dense mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and often flowing at great speed 【地质】火成碎屑流，火山灰流
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