energy level

名词 energy level:

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

1. Being at an energy level higher than the ground state.
   受激发的处于高于基态的能量级的
2. A free energy level.
   未被占据的能量极
3. Electromagnetic radiation used to raise atoms or molecules to a higher energy level.
   电磁辐射能用来将原子或分子提升到较高能级的电磁辐射