介绍： 版权归原作所有，仅供此学习，若有侵权请告知删除。
[12:06.77]The last reading.
[12:08.66]Earthquakes
[12:10.78]An earthquake is the result of a sudden release of energy in the Earth's crust.
[12:17.38]It starts when two plates move around each other.
[12:21.64]Energy is being stored when the plates press and st...

介绍： 版权归原作所有，仅供此学习，若有侵权请告知删除。
[12:06.77]The last reading.
[12:08.66]Earthquakes
[12:10.78]An earthquake is the result of a sudden release of energy in the Earth's crust.
[12:17.38]It starts when two plates move around each other.
[12:21.64]Energy is being stored when the plates press and stretch against each other.
[12:27.53]When released suddenly, the energy will break and shake the rock around the plates.
[12:34.60]At the Earth's surface, earthquakes manifest themselves
[12:39.07]by shaking or displacement of the ground.
[12:42.73]When the centre point of a large earthquake is located offshore,
[12:47.09]the sea bed may be displaced sufficiently to cause a tidal wave.
[12:51.82]Earthquakes can also trigger land slides and eruptions of volcanoes.
[12:58.37]Since earthquakes can cause disasters,
[13:01.98]people have been trying to predict them.
[13:05.03]However, the mass, elasticity and friction of the sliding plates vary between different areas.
[13:12.95]All these factors can influence where and when an earthquake starts,
[13:18.42]how strong it is, and how long it lasts.
[13:22.12]So it seems almost impossible to make such a prediction.