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  3. Earthquakes An earthquake is the result of a sudden release of energy in the Earth’s crust. / It starts when two plates move

Earthquakes An earthquake is the result of a sudden release of energy in the Earth’s crust. / It starts when two plates move

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答案 Earthquakes An earthquake is the result of a sudden release of energy in the Earth’s crust. / It starts when two plates move around each other. / Energy is being stored when the plates press and stretch against each other. / When released suddenly, the energy will break and shake the rock around the plates. / At the Earth’s surface, earthquakes manifest themselves / by shaking or displacement of the ground. / When the centre point of a large earthquake is located offshore, / the sea bed may be displaced sufficiently to cause a tidal wave. / Earthquakes can also trigger land slides and eruptions of volcanoes. / Since earthquakes can cause disasters, / people have been trying to predict them. / However, the mass, elasticity and friction of the sliding plates vary between different areas. / All these factors can influence where and when an earthquake starts, / how strong it is, and how long it lasts. / So it seems almost impossible to make such a prediction. /
解析     地震
   地震是地壳突然释放能量的结果。当板块相互挤压、拉伸时，能量得以储存。而能量的突然释放会使板块附近的岩石震动。地震表现为地表摇晃和位移。它可以引发海啸、土壤滑坡和火山爆发。
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