The air is thick with acrid smoke from the fires.

空气中充满了火灾产生的刺鼻浓烟。

《柯林斯英汉双解大词典》

As a result, the acrid smoke and smog that enveloped the capital, off and on this week, has returned forcing many to wear face masks outdoors.

这个星期，首都莫斯科不时被大火带来的刺鼻浓烟和浓雾笼罩着。很多人在户外时不得不戴上口罩。

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I got out and spent much of the next week staring at the unimaginable; my clothes became so stained by acrid smoke I eventually had to throw them away.

我从地铁上下来，接下来一个星期的大部分时间里，我都注视着那些难以想象的景象。我的衣服被刺鼻的烟雾搞得肮脏不堪，最后我只能把他们扔掉。

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When peat-bog fires blanketed Moscow and other big cities with acrid smoke in 2010, he took the controls of a firefighting plane on national TV.

WSJ: Russia After Putin

Later, after the buildings fell, a cameraman and I cut through the dust and walked toward ground zero, where the sky was filled with fine pieces of glass and acrid smoke.

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The fire had quickly spread to 10 other mats stored nearby, filling the building with acrid noxious smoke.

BBC: Teenager fire deaths accidental