The rate equation theory researches the basic relation of the atomic spontaneous emission, stimulated emission and stimulated absorption, and it is the fundamental theoretical calculations.
速率方程表征的是原子的自发辐射、受激辐射和受激吸收几率的基本关系，是进行理论计算的根本；
The rate equation theory researches the basic relation of the atomic spontaneous emission, stimulated emission and stimulated absorption, and it is the fundamental theoretical calculations.
速率方程表征的是原子的自发辐射、受激辐射和受激吸收几率的基本关系，是进行理论计算的根本；
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