singly excited造句

例句与造句

1. In order to obtain the MP2 formula for a closed-shell molecule, the second order RS-PT formula is written in a basis of doubly excited Slater determinants . ( Singly excited Slater determinants do not contribute because of the Brillouin theorem ).
2. However, for most chemical reactions, " two " electrons occupy the corresponding two critical molecular orbitals, generating " three " possible singlet electronic states of the system : the ground state, the singly excited state, and the doubly excited state ( Fig . 8 ).
3. It's difficult to find singly excited in a sentence. 用singly excited造句挺难的