As black as soot, And not soot.

像煤烟一样黑，而不是煤烟。

youdao

At the moment, most eyes are on soot (or "black carbon", as jargon-loving researchers refer to it).

当前，绝大多数眼球都注目于煤烟(或是“黑炭”，喜欢术语的研究者更倾向于使用这个单词)。

youdao

Usually a dark or black pigment such as soot was introduced into the pricked skin.

一般是深色或黑色颜料，比如把烟灰搓进刺破的皮肤中。

youdao