Eruption level;
基于6个网页-相关网页
eruption level
爆发水平
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The rate of seismicity was high before the new event but reduced during the eruption and overnight has remained at a low level.
BBC: Mount St Helens spews out steam and ash on 5 October 2004
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