complementary variational principles

例句：

1. 1.The complementary variational principles of the theory are crucial for its development.
   该理论的互补变分原理对其发展至关重要。
2. 2.The researchers proposed a new method based on the complementary variational principles.
   研究人员提出了一种新的方法，基于互补变分原理。
3. 3.The application of the complementary variational principles has greatly improved the efficiency of the algorithm.
   互补变分原理的应用大大提高了算法的效率。