earth-layer propagation

例句：

1. 1.The earth-layer propagation model is crucial for understanding the geological processes.
   地层传播模型对于理解地质过程至关重要。
2. 2. The research on earth-layer propagation has made significant progress in recent years.
   近年来，关于地层传播的研究取得了显著进展。
3. 3. The earth-layer propagation technique is widely used in oil and gas exploration.
   地层传播技术在石油和天然气勘探中得到了广泛应用。