Hellmann-Feynman theorem

例句：

1. 1. The Hellmann-Feynman theorem is a fundamental principle in quantum mechanics.
   海尔曼-费曼定理是量子力学的一个基本原理。
2. 2.This experiment confirms the Hellmann-Feynman theorem, which states that the energy levels of an atom are determined by its magnetic moment.
   这个实验证实了海尔曼-费曼定理，该定理指出原子的能量级由其磁矩决定。
3. 3. In the context of quantum mechanics, the Hellmann-Feynman theorem plays a crucial role inpredicting the behavior of particles.
   在量子力学的背景下，海尔曼-费曼定理在预测粒子行为中起着至关重要的作用。