The phase velocity of the plasma wave approaches the velocity of light due to the action of the longitudinal electric field.

在这样的纵向电场作用下，等离子体波的相速接近光速。

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Fortunately, when a laser or charged particle beam is sent through a plasma, interaction with the plasma can create a longitudinal electric field.

幸运的是，当雷射或带电粒子穿过电浆时，与电浆的作用可创造出纵向的电场。

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The longitudinal component of the electric field increase the write speed and provdies erasure.

纵向 电场 提高了写入速度及擦除速度。

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