指雾状的酸类物质acid fog

• 伦敦烟雾事件是煤烟污染形成酸雾的结果。

  London's smog was the result of soot pollution forming acid fog.

• 生活燃煤形成酸雾，使保护区内的一些树木枯萎。

  Acid fog created by everyday coal use has caused some of the trees in the conservation area to wither.