The lightning flashed across the sky.

闪电划过长空。

《新英汉大辞典》

The lightning flashed out from the black clouds.

乌云中电光闪闪。

《新英汉大辞典》

Towards evening, as the sun went down, dark clouds covered the sky, the thunder rolled and the lightning flashed, and the red light glowed on the icebergs as they rocked and tossed on the heaving sea.

不过在黄昏的时分，天上忽然布起了一片乌云。 电闪起来了，雷轰起未了。 黑色的巨浪掀起整片整片的冰块，使它们在血红的雷电中闪着光。

youdao

Greenish lightning flashed across the ocean darkness, and there was a distant grumble of thunder.

NEWYORKER: Rat Beach