collective electron theory

例句：

1. 1.The theory of relativity is a fundamental principle in the study of quantum mechanics.
   相对论是量子力学研究中的一个基本原理。
2. 2. The collective electron theory has been widely applied in the field of electronics.
   集体电子理论在电子领域得到了广泛应用。
3. 3. The collective electron theory provides a powerful tool for understanding the behavior ofatoms and molecules.
   集体电子理论为理解原子和分子的行为提供了有力的工具。