mercurial soot的用法和樣例：
例句
- The airborne carcinogens are in the atmosphere as absorbed matter on soot particles.
空氣傳播的致癌物在大氣中是煙炱粒子上吸附的物質。 - Although soot had been found throughout the world, fires need not have erupted everywhere, because soot could have been blown to some sites by the wind.
雖然全世界各地都有發現煙炱，但是火焰卻不見得處處都有，因為煙炱有可能是被風帶過去的。
