浓雾笼罩着小镇。

Thick fog ___hung over the town.

雾霾像致命的云一样笼罩着城市，导致了许多健康问题。

The smog ___hangs over the cities like a deadly cloud, resulting in many health problems.

一层薄雾整天都悬浮在山谷中。

A faint mist ___hangs in the valley all day long.