例句與造句

1. The twin state of the ground state is always the state of highest excitation-the doubly excited state and for most closed-shell chemical reactions and the quadrupally excited state for aromatic processes.
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 doubly excited state in a sentence. 用doubly excited state造句挺難的