vog
noun [ U ] uk/vɒɡ/ us/vɑːɡ/
火山雾（火山灰、二氧化硫和其它气体的混合物形成的空气污染）
a type of air pollution that is a mixture of ash (= the soft grey or black powder that is left after a substance has burned) from a volcano, sulphur dioxide, and other gases
A layer of ash has been dusting the hoods of vehicles and other surfaces, and when the wind is wrong, the vog is thick. 车辆的引擎盖和其他表面上都落了一层灰，风向不对时，火山雾很浓。
Short-term reactions to vog may include difficulty in breathing, as well as itchy eyes and a sore throat. 人体对火山雾的短期反应可能包括呼吸困难，以及眼睛发痒和喉咙痛。
- More examples
- Many residents awoke to find their homes enveloped in a thick layer of vog yesterday morning.
- The volcano spawns acid rain and a type of bluish smog that volcanologists call vog, which can affect large swaths of Europe.
- Last week, light winds from the south allowed thick vog to collect over much of the rest of the Big Island and to drift up the island chain.