The ground state level and the excited state level of the dye were determined by using the cyclic voltammetry and the optical absorption spectroscopy.

结合循环伏安曲线图及五甲川菁的光吸收阈值，初步确定五甲川菁染料电子基态和激发态能级位置。

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So if we go to the ground state, what you see is we're at that lowest energy level, and we only have one possibility for an orbital, because when n equals 1, that's all we can do.

如果我们在基态上，你可以看到，我们在能量最低的态上，只有一种，可能的轨道，因为n等于1，只有这种可能。

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