Sulfurdioxide, a major contributor to acid rain, is an especially serious pollutant because it diminishes the respiratory system's ability to deal with all other pollutants.
二氧化硫是酸雨的主要成因之一，它是一种特别严重的污染物，因为它会降低呼吸系统处理其他污染物的能力。
2
The level of sulfurdioxide gas above Venus's clouds shows large and very frequent fluctuations.
金星云层上方的二氧化硫气体水平显示出巨大且非常频繁的波动。
3
The emission of sulfurdioxide when high-sulfur coal is burned is restricted by law.