seismic system

例句：

1. 1. The earthquake caused widespread damage to the city.
   地震导致城市广泛受损。
2. 2.The seismic activity in the area is causing concern for residents.
   该地区的地震活动让居民感到担忧。
3. 3.The seismologists are studying the causes of this recent earthquake.
   地震学家正在研究这起最近地震的原因。