free flexural wave

例句：

1. 1.The free flexural wave is a phenomenon that occurs when the Earth's crust moves under its own weight.
   自由弯曲波是一种现象，当地球的地壳在其自身重量下移动时会发生。
2. 2.In this case, the free flexural wave is responsible for the earthquake.
   在这种情况下，自由弯曲波是地震的原因。
3. 3.The free flexural wave can be used to measure the strength of materials and predict their behavior under stress.
   自由弯曲波可以用来测量材料的力量和预测它们在应力下的行为。