Castigliano theorem

例句：

1. 1.The Castigliano theorem is a fundamental principle in the study of economics.
   卡斯蒂利亚诺定理是经济学研究中的一个基本原理。
2. 2. The Castigliano theorem has been proven to be accurate in predicting market trends.
   卡斯蒂利亚诺定理已被证明在预测市场趋势方面是准确的。
3. 3. The Castigliano theorem has been widely applied in various fields, including finance and engineering.
   卡斯蒂利亚诺定理已被广泛应用于金融和工程等领域。