单词：volcanic activity
volcanic activity的用法和样例：
例句
- This is unlike volcanic activity above the sea.这同高出洋面的火山活动是不同的。
- "A science fiction cannot not be regarded as a mere entertainment, but in fact it tells the reader much more.""科幻小说不能简单地看成是供消遣的，而实际上它给读者展示更深刻的内容。"
- Contemporaneous volcanic activity is represented by basic to intermediate lava and tuff.同时期的火山活动性是由中性熔岩与凝灰岩呈基性而体现出来的。
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