dynamic coefficient subgrade reaction

例句：

1. 1. The dynamic coefficient of the foundation is crucial for the stability of the structure.
   地基的动力系数对于结构的稳定性至关重要。
2. 2. The subgrade reaction under the load is an important factor in determining the performance of the foundation.
   荷载下的地基反应是决定地基性能的一个重要因素。
3. 3. The dynamic coefficient and subgrade reaction are closely related to the design of the foundation system.
   动力系数和地基反应与地基系统的设计密切相关。