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Noun:
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the phenomena associated with volcanic activity
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用作名詞 (n.)
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The volcanism is strong in Cenozoic and has several periods.
下陷中新生入學代火山功效猛烈，也含有多期性。
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The formation of auriferous strata was controlled by volcanism and eustacy.
火山功效和海平面圖變化對含金的地層的造成實現了抑制功效。
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及以上資源全權創作實踐，受著述權保護區，抄襲必究
海詞漢語詞典，二十七年公司
美
['v?lk?n?z?m]