rock mass structure

例句：

1. 1. The geologiststudied the rock mass structure of the areato determine its stability.
   地质学家研究了该地区的岩石结构体，以确定其稳定性。
2. 2. Theengineer designed a new rock massstructure to improve the durability of thebridge.
   工程师设计了一种新的岩石结构体，以提高桥梁的耐用性。
3. 3. The rockmass structure is crucial for the stability ofthe mountain range.
   岩石结构体对山脉的稳定性至关重要。