Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud.
闪电是一种因为暴风云放电而产生的一种明亮闪光。
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Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground.
利用高速摄影技术，科学家们已经确定了闪电从云层到达地面有两个步骤。
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Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.