Their faces were blackened with soot.
他们满脸煤灰。
The parks and squares looked grim under a mantle of soot and ash.
在一层烟尘的笼罩下，这些公园和广场显得阴沉沉的。
Not all air pollution starts out as soot.
并非所有的空气污染物一开始都是煤烟。
These are pollutants, particularly ozone and soot, that do not hang around in the atmosphere as carbon dioxide does.
这些污染物，尤其是臭氧和煤烟，不像二氧化碳那样悬浮在大气中。
Airborne soot and dirt from the impact blanketed Earth, inhibiting photosynthesis and triggering mass extinction of species.
撞击产生的烟尘和灰尘覆盖了地球，抑制了光合作用，引发了物种的大规模灭绝。
It does not distribute neurotoxic mercury around the planet; it does not clog city air and the lungs of those who breathe it with soot and sulfur.
它不会在地球上散播神经毒性汞；它不会用烟尘和硫堵塞城市空气和呼吸者的肺。
The doors and Windows were blurred with soot.
那些门窗被煤烟弄得很脏。
But not all air pollution starts out as soot.
但空气污染物最初的形态并不一定都是烟尘。
And traditional sources emit harmful fumes and soot.
传统的燃料燃烧会释放有害的气体和烟尘。
Hundreds of buildings are covered in pale white soot.
数以百计的建筑被苍白的灰烬所覆盖。
His old dog rolls in the ash and cloaks itself in soot.
他那头年老的狗就在灰烬里翻滚，使自己隐没在烟灰中。
The ink appears to be an ancient recipe—a mix of iron gall and soot inks.
其中的墨迹被认为来自一种古老的配方，一种将鞣酸铁与煤烟混合而成的墨水。
The inefficient burning typical in a fireplace also creates plenty of soot.
低效的燃烧——典型的如在壁炉——也会产生大量的烟尘。
The analysis found that cyclists had 2.3 times more soot in their airway cells.
分析表明，骑自行车者下呼吸道细胞中的煤烟含量要高出2.3倍。
Electric fields can help reduce soot formation and pollutant emissions from flames.
电场可助于降低火焰中烟尘的形成以及污染物的排放。
Both soot and ozone cause respiratory problems and can permanently damage the lungs.
烟灰和臭氧都会造成呼吸系统疾病而且会对肺部造成永久性损伤。
But pyrolytic stoves produce almost no soot-the carbon is all locked into the biochar.
但是热分解炉几乎不产生黑烟，碳全都锁在了生物炭中。
And the amount of soot added to the atmosphere as a result of all our cars nearly doubles.
所有汽车排放到空气中的煤烟更是几乎成倍增加。
Instead, they were surprised to find a thick haze, loaded with soot, smothering the mountain slope.
然而他们惊讶的发现了一片充斥着烟尘的厚厚阴霾，笼罩着山坡。
Change the 20-nanometer iridium to same-sized soot particles and the uptake rate falls by 75 percent.
若用相同大小的20纳米烟尘颗粒替换铱粒子，则摄入率降低75%。
From 2012 diesel trains will have to reduce their emissions of nitrogen oxides by 39% and of soot by 88%.
2012年起，柴油机列车须将其氮氧化合物排放降低39%，烟尘排放降低88%。
They noticed deep charring at the base of some of the walls and patterns of soot that made them suspicious.
一些墙基被严重烧焦和一些烟灰的痕迹引起了他们的怀疑。
A new study confirms that black carbon — more commonly known as soot — is a significant player in global warming.
一项新的研究证实，黑碳-更通俗称为煤烟-是全球变暖的一个重要因素。
Power stations burn coal at a higher temperature and produce less sulphur dioxide but also significantly less soot.
发电厂高温燃煤不但产生的二氧化硫少，而且煤烟也大大减少。
The soot released into the air as a consequence is also a climate-changer because, being dark, it absorbs heat.
黑烟散发到空气中，其结果还会导致气候变化，因为黑色吸热。
It releases lots of soot and various noxious chemicals as it burns, and so has fallen out of favour in many Western countries.
它会随着燃烧释放大量煤烟和有害化学物质，因此许多西方国家已经不再钟情于它了。
These capture most of the heat from the fuel, greatly reducing the amount of wood required, and they slash soot emissions too.
这可以获取燃料中的大部分能量，大幅减少所需的木头，还可以减少烟尘排放。
These capture most of the heat from the fuel, greatly reducing the amount of wood required, and they slash soot emissions too.
这可以获取燃料中的大部分能量，大幅减少所需的木头，还可以减少烟尘排放。
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