The thunder roared, and the sky was filled with flashes of lightning.

雷声咆哮着，天空布满了闪电。

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Much bigger flashes are usually seen during thunder-storms.

雷雨天时，通常会看到强得多的闪电。

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Then there came flashes of lightning, rumblings, peals of thunder and a severe earthquake. No earthquake like it has ever occurred since man has been on earth, so tremendous was the quake.

又有闪电、声音、雷轰、大地震、自从地上有人以来、没有这样大这样利害的地震。

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Visitors come to the lake to see the strange natural phenomenon known as Catatumbo Lightening: frequent flashes of light with no thunder that go on all night.

BBC: Venezuela��s Andean playground