Scientists study the Earth and natural disasters through the science of seismology - how seismic waves move through the Earth - and seismometers are their most important tool.
地震学是研究地震波如何在地球内部传播的科学。科学家通过地震学研究地球及自然灾难，地震仪是最有效的工具。
Scientists study the Earth and natural disasters through the science of seismology –how seismic waves move through the Earth –and seismometers are their most important tool.
地震学是研究地震波如何在地球内部传播的科学。 科学家通过地震学研究地球及自然灾难，地震仪是最有效的工具。
In its most generic sense, the word earthquake is used to describe any seismic event-whether a natural phenomenon or an event caused by humans-that generates seismic waves.
在它的最普通的感觉，词地震使用描述任何地震事件是否一种自然现象或事件造成由人引起地波。
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