活火山爆发是一种可怕的自然现象。
地震是地球表面的振动，这就像风、雨和闪电、泥石流、火山爆发一样，目前地球上经常发生的一种自然现象。
Earthquakes are of the earth's surface vibration, this is like the wind, rain, and lightning, debris flow, volcanic outbursts on earth, is often happened a natural phenomenon.
地震是地球表面的振动，这就像风、雨和闪电、泥石流、火山爆发一样，目前地球上经常发生的一种自然现象。
Earthquake is the shake of earth's surface, like wind, rain, lightning, debris flow, volcano's eruption, which is a natural phenomenon.
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