When an electron leaps into the conduction band, it leaves behind a hole in the valence band.

当一个电子跃迁到传导带，它会在价带留下一个“凹陷”。

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The extra electron fills up the lower-energy state in the conduction band, causing excited electrons to, effectively, spill over into the higher-energy, photon-emitting state.

这个额外的电子填充了传导带的较低能级，有效的导致了被激发的电子溢入较高，释放光子的能级。

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But in fact, an electron in the conduction band can be in one of two states.

但实际上，电子在这种传导带中存在两种形态。

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