名詞 energy level:

1. a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules
   同義詞：energy state

1. Being at an energy level higher than the ground state.
   受激發(fā)的處于高于基態(tài)的能量級的
2. A free energy level.
   未被占據的能量極
3. Electromagnetic radiation used to raise atoms or molecules to a higher energy level.
   電磁輻射能用來將原子或分子提升到較高能級的電磁輻射