soot black

同根派生

The 1000 annual launches would belch out about 600 tonnes of soot, or black carbon – less than today's output from airplanes and other sources.
每年1000次的發(fā)射率會釋放600噸的煙塵或黑碳----比飛機或其他每天的排放量要少。
"If I wore a white shirt to school, by the end of the day it would be brown, " recalls He, who was born in 1974, "and there would be a ring of black soot under the collar."
他回憶說：“如果我穿一件白襯衫去上學(xué)，一天下來襯衫就變成了棕褐色。領(lǐng)子下面還有一圈黑黑的煙灰?！?/li>
It is not possible to tell from this view exactly what pollutants made up the haze on February 20, but it probably contains mostly soot or black carbon and possibly some ground-level ozone.
從照片上我們不能得知污染物是如何造成2月20日的煙霧污染的，但是煙霧中很可能含有大量的煤灰或者炭黑也許還有地面臭氧。

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He did this so many times that the walls of his cell were black with soot.
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