theoretical equation的用法和樣例：
例句
- Based on the mechanism of piling, theoretical formulas of constructional parameters are derived and then applied to the practice of engineering.
從成樁工藝出發，推導出施工參數的理論公式，對工藝流程進行量化管理，並應用到工程實踐中。 - A theoretical formula for calculating interaction forces and the stable coefficient of individual slices under instable states was then deduced.
推導出了土坡失穩情況下，計算條間力大小及各土條穩定係數的理論公式。
