名词
中文翻译：Unknown
同义词：
['earthquake shaker', 'seismic shaker']
例句：
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1. The ground shaker was used to detect the earthquake before it happened.
地震前，人们使用地面震动器来探测地震。
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2. The engineer designed a seismic shaker to withstand the earthquake's impact.
工程师设计了一种抗震震动器，以承受地震的冲击。
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3. The ground shaker was used as a warning system during the earthquake.
在地震发生时，地面震动器被用作预警系统。