theoretical equation的用法和样例：
例句
- Based on the mechanism of piling, theoretical formulas of constructional parameters are derived and then applied to the practice of engineering.
从成桩工艺出发，推导出施工参数的理论公式，对工艺流程进行量化管理，并应用到工程实践中。 - A theoretical formula for calculating interaction forces and the stable coefficient of individual slices under instable states was then deduced.
推导出了土坡失稳情况下，计算条间力大小及各土条稳定系数的理论公式。
