The city is covered by a foul-smelling cloud of smoke.

城市被一团恶臭的烟云笼罩着。

《柯林斯英汉双解大词典》

A cloud drifted by and covered the moon.

飘过来一片云彩挡住了月亮。

《新英汉大辞典》

Then the cloud covered the Tent of Meeting, and the glory of the Lord filled the tabernacle.

当时，云彩遮盖会幕，耶和华的荣光就充满了帐幕。

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Far off the main roads, tourism here is even sparser than the route from Lushoto to Mtae, but the violet-covered hills and butterfly-filled cloud forests do lure some visitors, who can access the park independently or through a tour.

BBC: A tranquil slice of Tanzania

On the mainland, the glacier-covered cone of the Cerro Macau volcano peeked above the cloud and the straggly fishing port of Puerto Montt came into view.

BBC: Patagonia��s ice-carved waterways

But walking in Bolivia is also an experience in diversity: one day you can be in snow-covered mountains and the next you might descend through moss-strewn cloud forests to jungle lowlands.

BBC: In Bolivia, awe-inspiring scenes at every turn