这次闪电是一个负极梯级先导，它是从一架飞机上拍下的。
This lightning, a negative stepped leader, was filmed from an airplane.
通过分析发现，MGPF的形成与闪电的梯级先导、连接过程等有重要关系。
The leader and attachment process have important effects on the formation of MGPF.
通过分析发现，MGPF的形成与闪电的梯级先导、连接过程等有重要关系。
The leader and attachment process have important effects on the formation of MGPF.
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