pre-seismic

例句：

1. 1. The seismometer is used to detect pre-seismic tremors in the ground.
   地震仪用于探测地面的地震前震动。
2. 2.The researchers found that the pre-seismic activity was linked to changes in atmospheric pressure.
   研究人员发现，地震前的活动与大气压力的变化有关。
3. 3.The scientists are studying the pre-seismic behavior of the earth's crust.
   科学家们正在研究地球地壳在地震前的动态行为。