Cosmic rays and X-rays produce energetic electrons by ionization.

宇宙射线和X射线因其电离作用产生高能电子。

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X-rays were produced when energetic electrons hit a solid object.

射线是在高能电子击中固体靶时产生的。

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Cosmic rays and X - rays produce energetic electrons by ionization.

宇宙射线和x射线因其电离作用产生高能电子。

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For example, a radioactive isotope such as nickel-63 releases so-called beta particles a highly energetic form of electrons.

ECONOMIST: Micromachines: The engines of Lilliput | The

Because radiation from the Crab nebula is so energetic, the electrons that created it must have been travelling very close to the speed of light so close that the difference between the two speeds would bump up against Planck-scale graininess, and show up in the spectrum of the radiation.

ECONOMIST: Planck-scale physics