Storms producing cloud to groundlightning (lightning that strikes the ground) in isolated thunderstorms or super cells (which can be very dangerous) produce some dramatic pictures.
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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The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning.