"111452750"^^ . "a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules; \"according to quantum theory only certain energy levels are possible\""@en-us . "energy level"^^ . . . "110713429"@en-us . . . . "0"^^ . "0"^^ . "energy level"@en-us . . "energy state"@en-us . . . "11452750-n"^^ . . . .