A pall of oily black smoke drifted over the cliff-top.

一股漆黑的烟雾飘过了崖顶。

《柯林斯英汉双解大词典》

In the image, Moscow is hidden under a pall of smoke.

在图片中我们可以看到，整个莫斯科都笼罩在浓烟之中。

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A pall of oily black smoke drifted over the cliff -top.

一团油腻的黑色烟雾飘到悬崖顶上。

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Soon there was a thick black pall of smoke hanging low over the apartment blocks and minarets.

BBC: NEWS | Middle East | Gaza mourns symbol of struggle

He looks at the pall of smoke nearby, then points to the sludge about three-feet broad that's now covering the beach next to his business.

NPR: Oil Slick Threatens Lebanese Coast

There's a very thick pall of smoke which smells kind of like a mixture of menthol and charcoal because there are quite a few eucalyptus trees in the forest.

NPR: In Portugal Another Season of Forest Fires