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1. The precompression wave is a type of stress wave that occurs before the material is subjected to an external force.
预压缩波是一种应力波，发生在材料受到外部力作用之前。
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2. In earthquake engineering, understanding the behavior of precompression waves is crucial for predicting seismic activity.
在地震工程中，理解预压缩波的行为对于预测地震活动至关重要。
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3. The precompression wave can be used to measure the strength and stiffness of materials before they aresubjected to stress.
预压缩波可以用来测量材料在受到应力之前的力量和刚度。