The electron source may emit electrons either via field emission or thermionic emission.
该电子源可经由场发射或热离子发射来发射电子。
As a result, the electron will not emit a photon when it loses energy.
结果就是，当电子损失能量是，它不会释放光子。
Cesium-133 atoms emit a thin microwave spectral line when its 55th electron jumps back from an excited state orbital to its ground state (transition).
铯133原子发射一个细的微波谱线当它的第55个电子从受激态轨道跳回基态时(跃迁)。
The matrix of dots on a CRT screen (or TV set) that emit light when bombarded by an electron beam.
阴极射线管(crt)或电视(tv)屏幕上的点阵列，当电子束击中时会发光。
As a convenient and cheap cathode, velvet can emit intensive electron beam and is widely used in high power electron devices.
天鹅绒阴极能够产生高亮度强流电子束，并且成本低、使用方便，在强流高功率单脉冲电子束装置中得到了广泛的应用。
When an ideal diode was alive under a magnetic field, it could emit a thermal electron from its negative plate.
通过理论分析，利用理想二极管外加磁场的方法，证明了真空中热电子发射的电子动能分布符合费米-狄拉克分布。
When an ideal diode was alive under a magnetic field, it could emit a thermal electron from its negative plate.
通过理论分析，利用理想二极管外加磁场的方法，证明了真空中热电子发射的电子动能分布符合费米-狄拉克分布。
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