So we have four choices in terms of initial and final energy levels, and also what it means - in terms of the electron — whether it's gaining energy or whether it's going to be emitting energy?

我们有这四个选项，各有不同的初始能量和末能量，它都是按照电子来说的，不管是失去能量还是得到能量？

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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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Finally, inward-emitting coaxial diode was used as an example to validate the simulation of current-voltage correlation and characteristics of electron beam movement.

以向内发射同轴二极管为例从其电流电压关系及电子束运动特性方面验证了模拟的正确性。

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So we have four choices in terms of initial and final energy levels, and also what it means - in terms of the electron -- whether it's gaining energy or whether it's going to be emitting energy?

我们有这四个选项,各有不同的初始能量和末能量,它都是按照电子来说的,不管是失去能量还是得到能量？

麻省理工公开课 - 化学原理课程节选