It dose not follow the pattern used in traditional teaching materials which regards Bohr oldquantum theory and atomic spectrum as the thread, but resorts to quantum-mechanical conception and language.

• 它没有沿袭传统原子物理学教材以玻尔旧量子论和原子光谱为主线的模式，而是采用量子力学的基本概念和语言来陈述。