This lightning, a negative stepped leader, was filmed from an airplane.

这次闪电是一个负极梯级先导，它是从一架飞机上拍下的。

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Eventually a negative stepped leader travels downward and reaches the ground, creating a return stroke.

最终一个下行传播的负极梯形先导接触到地面，制造了一次回击。

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As the negative stepped leader gets closer to the tower, a positive leader forms from the tower tip and moves upward.

随着负极梯级先导向塔不断靠近，塔顶端的正极先导形成并且上行移动。

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Finally, their leader stepped forward to say that bringing the bottle of wine was "not permitted!"

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Warren Bradley, 45, of Woodsorrell Road, Wavertree, stepped down as leader of the city's Liberal Democrat party last April over electoral fraud claims.

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Lib Dem councillor David Budd stepped down as leader at Tuesday's council meeting after the Tories gained a seat in the poll in Lytchett Matravers.

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