electromagnetic wave abnormal change

• 地震

electromagnetic wave abnormal change的用法和样例：

例句

1. Rock movements during an earthquake can make rivers change their course.
   地震过程中岩石的运动能使河流改道。
2. From these wave arrival times, seismologists can calculate the distance of an earthquake from each seismograph.
   根据这些波到达的时间，地震学家们能够计算出地震离地震仪的距离。